5,500,000,000
1.500.000
A US Billion* has 9 digits following the leading digits (64 being the leading digits in this case.)So 64.1 billion dollars = $64,100,000,000Notice that if you count the number of digits after 64 there are 9Note*: A billion in some other countries is actually a million million (or having 12 digits after the leading digits.) For finance this magnitude of number does not make sense (it's much too large,) and instead the US Billion is used.
6.9 billion as a number would be 6,900,000,000. To write it out without digits it would be six billion and nine hundred million.
60,000,000
20,000,000
It is: 500,000,000,000 = 500 billion
Fill out digits to the right of the decimal point, until you have 9 digits after the point. After the "1", just add zeroes. Then take the point away. In some countries, a billion is a 1 with 12 zeroes, instead of 9, so check the definition of "billion" in your country. However, a 1 with 9 zeroes is the more commonly-used definition.
1,600,000
580,000,000
29,000,000,000
1,300,000,000
1,000,000,000
It is 7,046,000,000.