en.wikipedia.org/wiki/Names_of_large_numbers

This article lists and discusses the usage and derivation of names of large numbers, together .... Some names of large numbers, such as million, billion, and trillion, have real referents .... the names million, billion, trillion, quadrillion, and so forth, but from the way in which .... 10, 1033, Decillion, Thousand quintillion, Quintilliard.

www.statman.info/conversions/number_scales.html

1,000,000,000,000,000,000,000, zetta, Z, Sextillion, Thousand Trillion/Trilliard ... Trillion. 1,000,000,000,000,000, peta, P, Quadrillion, Thousand Billion/Billiard.

www.khanacademy.org/questions/what-comes-after-trillions/kafb_3431682

tens 10 hundreds 100 thousand 1,000 1 million 1,000,000 2 billion 1,000,000,000 3 trillion 1,000,000,000,000 4 quadrillion 1,000,000,000,000,000 5 quintillion ...

www.sciforums.com/threads/million-billion-trillion-then-what.10130

milliard = one thousand times one million. - billion = one million times one million. However, since ... quintillion = 10<sup>18</sup> hexillion ...

www.thealmightyguru.com/Pointless/BigNumbers.html

1, million, 6 (1,000,000). 2, billion, 9 (1,000,000,000). 3, trillion, 12 ... 4, quadrillion, 15 (1,000,000,000,000,000). 5, quintillion, 18 ( 1,000,000,000,000,000,000).

www.mathnstuff.com/math/spoken/here/2class/10/size.htm

2 thousand is 2,000: is 2 thousand: = 2 x 103: 2 million is 2,000,000: is 2 thousand ... 2 x 1015: or: is 2 million billions: = 2 x 106 x 109: = 2 x 1015: 2 quintillion is ...

blog.oxforddictionaries.com/2014/12/psy-youtube-quintillion

Dec 9, 2014 ... (Although the British and American definitions of billion used to differ, it is now widely understood to mean 'a thousand million'.) Above that ...

2000clicks.com/graeme/LangNumbersMillionsAndBillionsAndZillions.htm

9, 1, 000, 000, 000, Billion, Thousand Million, or "Milliard". 12, 1, 000, 000, 000, 000, Trillion, Billion. 15, 1, 000, 000, 000, 000, 000, Quadrillion, Thousand Billion.

mathcentral.uregina.ca/qq/database/qq.09.95/blaine1.html

( to save some typing I am going to write 10^3 to mean 10x10x10=1 000, 10^4 = 10x10x10x10 = 10 000 and so on so a trillion is 10^12) quadrillion; 10^15