18616385488 has 20 divisors (see below), whose sum is σ = 36147164608. Its totient is φ = 9288084960.

The previous prime is 18616385441. The next prime is 18616385507. The reversal of 18616385488 is 88458361681.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1249098 + ... + 1263913.

Almost surely, 2^18616385488 is an apocalyptic number.

It is an amenable number.

18616385488 is a deficient number, since it is larger than the sum of its proper divisors (17530779120).

18616385488 is a wasteful number, since it uses less digits than its factorization.

18616385488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2513482 (or 2513476 counting only the distinct ones).

The product of its digits is 8847360, while the sum is 58.

The spelling of 18616385488 in words is "eighteen billion, six hundred sixteen million, three hundred eighty-five thousand, four hundred eighty-eight".