One octillion.
In the US and for most uses in the UK, the number of zeros is 18 (eighteen).1,000,000,000 x 1,000,000,000 = 1,000,000,000,000,000,000The name for a "billion billion" is a quintillion, 1 x 1018.(Under the "long scale" traditionally used, a billion was a million million, which is a trillion on the short scale. On the long scale, a billion billion would have 24 zeros.)
The US short scale for a billion billion (quintillion) is 1,000,000,000,000,000,000 (1 x 1018). The short scale adds new number names by thousands (a billion is 1000 million). On the long scale (European), a billion billion is 1 followed by 24 zeroes (1 x 1024).
Million: 1,000,000 Billion: 1,000,000,000 Trillion: 1,000,000,000,000 Quintillion: 1,000,000,000,000,000,000 Sextillion: 1,000,000,000,000,000,000,000 Nonillion: 1,000,000,000,000,000,000,000,000,000,000 Centillion: 1 followed by 303 zeros
1 billion short scale = 109 or 1 billion long scale 1012 1 billion x 1 billion = short scale 1018 1 billion x 1 billion = long scale 1024 109 = 1 billion short scale and 1 milliard long scale. 1012 = 1 trillion short scale and 1billion long scale. 1015 = 1 quadrillion short scale and 1 billiard long scale. 1018 = 1 quintillion short scale and 1 trillion long scale. 1024 = 1 quadrillion short scale and 1 septillion long scale.
Oh, what a happy little question! When you multiply 1 billion by 1 billion, you get 1 trillion. That's a whole lot of zeros, just like a field full of beautiful flowers stretching as far as the eye can see. Just imagine all the wonderful possibilities that number holds!
The number 1,000,000,000,000,000,000 can be written as "one quintillion" in words. In the short scale system, which is commonly used in the US and modern English-speaking countries, each group of three zeros is represented by a new term (thousand, million, billion, trillion, quadrillion, quintillion, and so on).
A quintillion has 18 zeros. It is represented as 1 followed by 18 zeros, or in numerical form, 1,000,000,000,000,000,000. In the short scale system, which is commonly used in the United States, quintillion follows billion (which has 9 zeros) and trillion (which has 12 zeros).
The number 641850000000000000000000 or 641,850,000,000,000,000,000,000 is (on the US short scale) six hundred forty-one sextillion, eight hundred fifty quintillion.(641.85 billion trillion)
The ascending number names are based on Latin prefixes. But they begin at billion (which is short scale for 109). The following number names are trillion (1012), quadrillion, quintillion, sextillion, septillion, octillion, nonillion, and decillion.
According to short scale notation, one quintillion is equal to 1018 or 1 followed by 18 zeroes.According to long scale notation, one quintillion is equal to 1030 or 1 followed by 30 zeroes.
In the US short scale (number names by thousands), one hundred quintillion.100000000000000000000 = 100,000,000,000,000,000,000(one hundred billion billion, short scale)
The number 400000000000000000000000000000000000000000 is called four hundred quintillion. It can also be expressed in scientific notation as 4 x 10^38. In the short scale system, which is commonly used in the United States, a quintillion represents a one followed by 18 zeros.