9999999999999 x 99999999999999999999999999999999999999999 = 999999999999899999999999999999999999999990000000000001 [That was actually much quicker to work out than to type in (accurately)!]
1000000000 to 10000000000000000000000000000000000
nillon
10000000000000000000000000000000000.
Once
10000000000000000000000000000000000 a big number
about 99999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999x 99999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999
-3.888888888888888888888888888888888 = -3888888888888888888888888888888888/ 10000000000000000000000000000000000 which can be simplified to = -486111111111111111111111111111111/ 1250000000000000000000000000000000
10000000000000000000000000000000000 plus a 100 dolar tip
0.4444444444444444444444444444444444 = 4444444444444444444444444444444444/ 10000000000000000000000000000000000 That can be simplified but sorry, I cannot be bothered.
10 billion trillion trillion (its sorta big) (⌐■_■)
1, because it is the number that shows up the most. If it is just a number by itself, it IS the number.