In American usage 1 billion is 1,000,000,000 - so there would be 10 zeroes in 850 billion.
In England, and some other countries, 1 billion is 1,000,000,000,000, so there would be 13 zeroes in 850 billion.
Chat with our AI personalities
There are 9 zeros in one billion
A billion is 1 followed by nine zeros 70 billion thus has 10 zeros 70,000,000,000
Seven zeros.
9 zeros
Eight zeros.