It could be: (M)M which means 1,000*1,000*1,000 = 1,000,000,000
But in all reality the ancient Romans had little need for such huge numbers
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If it was a number, it would be 1,000,000,000,000,000,000.
But, there is no such number as one billion billion.
True, but a lot more people would be able to tell you what a billion billion is than would know what a quintillion is. Communication of the amount is probably more important than whether or not the name for the number exists.
As a number: 38,000,000,000
You write a bar above one or more numbers (you have to write it after one or more numbers or the decimal).It repeats.
2,000,000,000
21,700,000,000
$3,000,000,000 yep dats write