564001644 has 24 divisors (see below), whose sum is σ = 1316643328. Its totient is φ = 187909200.

The previous prime is 564001637. The next prime is 564001661. The reversal of 564001644 is 446100465.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17169 + ... + 37719.

Almost surely, 2^564001644 is an apocalyptic number.

It is an amenable number.

564001644 is an abundant number, since it is smaller than the sum of its proper divisors (752641684).

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

564001644 is a wasteful number, since it uses less digits than its factorization.

564001644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22845 (or 22843 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 564001644 is about 23748.7187864946. The cubic root of 564001644 is about 826.2157253420.

The spelling of 564001644 in words is "five hundred sixty-four million, one thousand, six hundred forty-four".