3535316142212174320

In Czech republic, there is a lottery named Šťastných 10 (In english "Happy 10"), where you pick 1-10 numbers of 80. When it draws, 20 numbers of 80 numbers are drawn. The biggest combination that you can get, is 80C20 = 3,535,316,142,212,180,000 (3 and a half quintillion is short scale or 3 and a half trillion combinations). The table of chances is:

Note
The source is in Czech language.