If you issue cheques very often, and wonder how to write that weird amount in words, then lisp may come to your rescue.
CL-USER> (format t "~R" 5374538457834758345)
five quintillion three hundred seventy-four quadrillion five hundred thirty-eight trillion four hundred fifty
-seven billion eight hundred thirty-four million seven hundred fifty-eight thousand three hundred forty-five
NIL
CL-USER>
