OMG I think i'm going to lose my mind. I am trying to enter a 16 digit number into a cell in excel and it keeps converting it into a bizarre number. Example, if I enter 5555000044446666 as soon as I tab out of that cell, it turns into 5.555E+15. I have tried "format cells" using General, Number, Text and everything else and it keeps doing this. What the crap?