One and fifteen hundredths of a billion or, more usefully, one billion one hundred and fifty million.
115 = one hundred fifteen.
One billion.
Three billion.
Fifty-eight billion.
One quintillion.
thirty five billion
In words, 85,000,000,000 is eighty-five billion
One billion.
Ninety billion.
Five billion.
one billon
Expressed in words, 4.6 billion would be written "four billion, six hundred million".