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.
40,300,000,000
As a number it is: 1,800,000,000 = 1.8 billion
621,428,512,953
three billion twelve million four hundred twenty-eight thousand
I write 620 billion as 620 billion.
Sixteen point two billion is how I would write it.
400 400 and a 428 400 and a 428 400 and a 428 400 and a 428 400 and a 428 400 and a 428 400 and a 428 400 and a 428 400 and a 428 400 and a 428 400 and a 428 400 and a 428 400 and a 428 400 and a 428 400 and a 428 400 and a 428 400 and a 428 400 and a 428 400 and a 428 400 and 428
You write 3.56 billion as 3,560,000,000.
40,300,000,000
428 is an integer and not a fraction. However, it can be expressed in rational form as 428/1. That is the simplest form. There is no sensible way of writing it as a mixed number.
four hundred twenty eight = 428
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