18160645572 has 72 divisors (see below), whose sum is σ = 46501297752. Its totient is φ = 5975424000.

The previous prime is 18160645549. The next prime is 18160645589. The reversal of 18160645572 is 27554606181.

18160645572 is a `hidden beast` number, since 1 + 8 + 16 + 0 + 64 + 5 + 572 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 4728762756 + 13431882816 = 68766^2 + 115896^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1217922 + ... + 1232742.

Almost surely, 2^18160645572 is an apocalyptic number.

18160645572 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18160645572 is an abundant number, since it is smaller than the sum of its proper divisors (28340652180).

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

18160645572 is a wasteful number, since it uses less digits than its factorization.

18160645572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15269 (or 15264 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 45.

The spelling of 18160645572 in words is "eighteen billion, one hundred sixty million, six hundred forty-five thousand, five hundred seventy-two".