Adding three further zeroes (or six, in Comonwealth English usage) to a trillion gives a quadrillion. Adding three further zeroes (or six, in Comonwealth English usage) to a quadrillion gives a quintillion.
Adding three (or six) zeroes to a quintillion gives a sextillion. In the more widely used American system, a sextillion is 10 followed by 21 zeroes, while in the Commonwealth English usage, it is equal to 10 followed by 36 zeroes.
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maybe a sextillion
The next number would be septillion
There is no such number. If we could count to any particular number, then we can always count to the next one. And then the next. And so on.
After cinquillion, the next number in the sequence of large numbers is sextillion. In the short scale system, which is commonly used in the United States and many other countries, a sextillion is equal to 10^21, or 1 followed by 21 zeros. This is preceded by cinquillion, which is 10^18.
one billion Names of some large numbers - in order smaller to larger. Million Billion Trillion Quadrillion Sextillion Septillion Octillion Decillio Undecillion