unchecked-add

(unchecked-add a b)

Answers the sum of integers wrapped to 64 bits, so (unchecked-add 9223372036854775807 1) is -9223372036854775808. A double or a ratio takes the plain result. nil and non-numbers signal. As a value a two-argument function.

An integer past 64 bits is a plain integer here, so the oracle's unwrapped bigint (100000000000000000000N) wraps too.