81600968 has 16 divisors (see below), whose sum is σ = 153393180. Its totient is φ = 40696128.

The previous prime is 81600943. The next prime is 81600989. The reversal of 81600968 is 86900618.

It can be written as a sum of positive squares in 2 ways, for example, as 73994404 + 7606564 = 8602^2 + 2758^2 .

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, 9671 + ... + 16022.

Almost surely, 2^81600968 is an apocalyptic number.

It is an amenable number.

81600968 is a deficient number, since it is larger than the sum of its proper divisors (71792212).

81600968 is a wasteful number, since it uses less digits than its factorization.

81600968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26096 (or 26092 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 81600968 is about 9033.3254120506. The cubic root of 81600968 is about 433.7422921612.

The spelling of 81600968 in words is "eighty-one million, six hundred thousand, nine hundred sixty-eight".