Billion

A billion is 109 = 1,000,000,000. In the long scale, 109 is called milliard, whereas "billion" is 1012. Like a million, a billion is often used as an exaggeration to mean an indefinitely large number.

The internet contains more than a billion webpages. It would take 951 years for a faucet running on full power to waste a billion gallons of water.

The billion seconds is roughly 31.7 years, and billion minutes is about 1902 years. April 29, 1902 the mankind celebrated the first billion minutes starting from our era.

The prefix giga- has meaning of one billion.