18617016816 has 60 divisors (see below), whose sum is σ = 52129523368. Its totient is φ = 6202369152.

The previous prime is 18617016779. The next prime is 18617016851. The reversal of 18617016816 is 61861071681.

18617016816 is a `hidden beast` number, since 1 + 8 + 617 + 0 + 16 + 8 + 16 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 244911 + ... + 311793.

Almost surely, 2^18617016816 is an apocalyptic number.

18617016816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18617016816 is an abundant number, since it is smaller than the sum of its proper divisors (33512506552).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18617016816 is a wasteful number, since it uses less digits than its factorization.

18617016816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68830 (or 68821 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 45.

The spelling of 18617016816 in words is "eighteen billion, six hundred seventeen million, sixteen thousand, eight hundred sixteen".