In the US, one billion is written as the numeral one followed by 9 zeros (1,000,000,000). So, in the US, a billion has ten (10) digits.
A billion has a very different meaning in the UK.
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10 digits
13 digits.
There are 10 digits in a billion.
In the US:1 billion = 1091 billion billion = 1018That's '1' followed by 18 zeros, for a grand total of 19 digits.But in the UK:1 billion = 10121 billion billion = 1024That's '1' followed by 24 zeros, for a grand total of 25 digits.
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.