unchecked-multiply

(unchecked-multiply a b)

Answers the product of integers wrapped to 64 bits, so (unchecked-multiply 4611686018427387904 4) is 0. 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.