Assuming it takes about 1 second to count each dollar, it would take one billion seconds, or about 31 years and 8 months.
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well it dapends how fast u count but i can count out 120 in a min so 60 billion/120=ur aunswer
If you counted 1 number per second, it would take 220 years to count to 7 billion.
If you counted 1 number per second, it would take at least 220 years to count to 6.9 billion.
1 billion seconds / 3600 / 24 / 365.2422 = 31.69 years
That depends a lot how many dollars you save every year.