OpenEuphoria

Thanks [to all] for the reply.

(2 ^53) /100 = 90,071,992,547,409.92 (90 trillion)

To prevent any (digit-based) overflow I should limit the max number of digits which then would give me an upper limit of 10 trillion less one cent.

The highest grossing companies have revenues approaching 1/2 a trillion USD so this method of storing monetary amounts would safely work for any one company, even a massive one, for many years. For our medium size company that limit will never be breached, so my code will never crash. Yay!