I write 620 billion as 620 billion.
Sixteen point two billion is how I would write it.
You write 3.56 billion as 3,560,000,000.
3.664*109 or 3.664 e+09
You can write 40.3 billion as 40,300,000,000.
You can write out 1.8 billion as "1,800,000,000" or "one billion eight hundred million."
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
35.9204067 billion
u write four billion like 4,0000,000,000
how to write 5.1 billion
200 billion billion in numerals is: 200,000,000,000,000,000,000