629 in Roman Numerals is DCXXIX :- D (500) + C(100) + XX(2 x 10) + IX(10-1) = 629
I write 620 billion as 620 billion.
It is already in Hindu-Arabic numerals
Sixteen point two billion is how I would write it.
You write 3.56 billion as 3,560,000,000.
DCXXIX
629 in Roman Numerals is DCXXIX :- D (500) + C(100) + XX(2 x 10) + IX(10-1) = 629
I write 620 billion as 620 billion.
It is already in Hindu-Arabic numerals
Sixteen point two billion is how I would write it.
You write 3.56 billion as 3,560,000,000.
In 1750, the population of the world was 629 million people. By the year 1950, the population had increased to 2.52 billion.
40,300,000,000
Oh, dude, it's like super simple. You just write it as 629. That's it. No need to complicate things with fancy words like "Hindu Arabic numerals." Just keep it chill and write it down like you normally would.
As a number it is: 1,800,000,000 = 1.8 billion
Since you asked how I would write the number, the answer is 1031.
1,000 billion billion is: 1,000,000,000,000,000,000,000