80931564 has 72 divisors (see below), whose sum is σ = 246122240. Its totient is φ = 21904992.

The previous prime is 80931563. The next prime is 80931593. The reversal of 80931564 is 46513908.

80931564 is a `hidden beast` number, since 8 + 0 + 93 + 1 + 564 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (80931563) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3664 + ... + 13239.

Almost surely, 2^80931564 is an apocalyptic number.

80931564 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

80931564 is an abundant number, since it is smaller than the sum of its proper divisors (165190676).

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

80931564 is a wasteful number, since it uses less digits than its factorization.

80931564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16939 (or 16934 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 80931564 is about 8996.1971965937. The cubic root of 80931564 is about 432.5529826947.

The spelling of 80931564 in words is "eighty million, nine hundred thirty-one thousand, five hundred sixty-four".