You add either 9 or 12 zeroes to the "100". There are two definitions for "billion", but in English-speaking countries, adding 9 zeroes is common.
Expressed in figures, 1.63 billion is equal to 1,630,000,000.
Expressed in figures, this is equal to 5500000000.
Expressed in figures, this is equal to 700,000,000,000.
Expressed in figures, this is equal to 6,675,000,000.
a quarter of a billion
1.37 billion = 1,370,000,000 in figures.
1,300,000,000
7,042,000,000
13,800,000,000
1,000,000,000
1,600,000,000
1,000,000,000