564596991 has 24 divisors (see below), whose sum is σ = 932758944. Its totient is φ = 322375680.

The previous prime is 564596983. The next prime is 564596993. The reversal of 564596991 is 199695465.

It is not a de Polignac number, because 564596991 - 2³ = 564596983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (564596993) 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, 104271 + ... + 109551.

It is an arithmetic number, because the mean of its divisors is an integer number (38864956).

Almost surely, 2^564596991 is an apocalyptic number.

564596991 is a deficient number, since it is larger than the sum of its proper divisors (368161953).

564596991 is a wasteful number, since it uses less digits than its factorization.

564596991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6991 (or 6988 counting only the distinct ones).

The product of its digits is 2624400, while the sum is 54.

The square root of 564596991 is about 23761.2497777369. The cubic root of 564596991 is about 826.5063344716.

The spelling of 564596991 in words is "five hundred sixty-four million, five hundred ninety-six thousand, nine hundred ninety-one".