564430661 has 8 divisors (see below), whose sum is σ = 580846464. Its totient is φ = 548198560.

The previous prime is 564430637. The next prime is 564430673. The reversal of 564430661 is 166034465.

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

It is a cyclic number.

It is not a de Polignac number, because 564430661 - 2²² = 560236357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (564430631) 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, 39680 + ... + 51993.

It is an arithmetic number, because the mean of its divisors is an integer number (72605808).

Almost surely, 2^564430661 is an apocalyptic number.

It is an amenable number.

564430661 is a deficient number, since it is larger than the sum of its proper divisors (16415803).

564430661 is a wasteful number, since it uses less digits than its factorization.

564430661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91851.

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 564430661 is about 23757.7494935863. The cubic root of 564430661 is about 826.4251637116.

The spelling of 564430661 in words is "five hundred sixty-four million, four hundred thirty thousand, six hundred sixty-one".