Multiply by two!

2^40 (1,099,511,627,776)

 

2,199,023,255,552

 

too much for my brain to handle and too lazy to get a calculator

 

4,398,046,511,104

 

8,796,093,022,208

 

17,592186044416

 

35184372088832

 

70,368,744,177,664

 

140737488355328

 

281,474,976,710,656

 

562949953421312

 

1125899906842624
(http://www.tsm-resources.com/alists/pow2.html dank)

 

2251799813685248

 

4503599627370496

 

9,007,199,254,740,992

 

18,014,398,509,481,984

 

36,028,797,018,963,968

 

72,057,594,037,927,936

 

1.44115188E17

 

no its
144,115,188,075,855,872

and then
288,230,376,151,711,744