Excel only supports numbers that fit in an IEEE754 double, just like JavaScript.
There is some fancy logic to format numbers, however (including some mess for date codes). http://oss.sheetjs.com/ssf/ is a pretty decent implementation in JavaScript.
There is some fancy logic to format numbers, however (including some mess for date codes). http://oss.sheetjs.com/ssf/ is a pretty decent implementation in JavaScript.
http://msdn.microsoft.com/en-us/library/office/bb687869%28v=...