4,000,000,539
2,039,498
100,000,000,000
30,500,000,000,000
450,300,000,000 or 450.3 billion
400,000,000,006 would be four hundred billion six.
The standard form is 640,000,000,000
200,000,000,000,000,000,000
520,000,000,000
900,000,000,070
2.0 × 1011
915,000,000,000
The standard form is 6,000,500,000