Four billion, nine hundred five million, six hundred ninety thousand.
seven billion, nine hundred twenty million, seven hundred seventy-two thousand, four hundred ninety-seven
That would be in the hundred millions. The smallest nine figure (digits) number is 100,000,000 (one hundred million). The largest is 999,999,999 (nine hundred ninety nine million nine hundred ninety nine thousand nine hundred ninety nine; almost a billion)
four million five hundred thousand
It is 15500000.
100,200,020 = one hundred million, two hundred thousand, twenty.
500,000,000 five hundred million 1,000,000,000 is one billion