564136491 has 8 divisors (see below), whose sum is σ = 756080080. Its totient is φ = 374141952.

The previous prime is 564136487. The next prime is 564136523. The reversal of 564136491 is 194631465.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 564136491 - 2² = 564136487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (564136471) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 486586 + ... + 487743.

It is an arithmetic number, because the mean of its divisors is an integer number (94510010).

Almost surely, 2^564136491 is an apocalyptic number.

564136491 is a deficient number, since it is larger than the sum of its proper divisors (191943589).

564136491 is a wasteful number, since it uses less digits than its factorization.

564136491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 974525.

The product of its digits is 77760, while the sum is 39.

The square root of 564136491 is about 23751.5576541834. The cubic root of 564136491 is about 826.2815666594.

The spelling of 564136491 in words is "five hundred sixty-four million, one hundred thirty-six thousand, four hundred ninety-one".