564163644 has 24 divisors (see below), whose sum is σ = 1436053248. Its totient is φ = 170958640.

The previous prime is 564163627. The next prime is 564163661. The reversal of 564163644 is 446361465.

It is an interprime number because it is at equal distance from previous prime (564163627) and next prime (564163661).

It is a super-2 number, since 2×564163644² = 636561234422717472, which contains 22 as substring.

It is a congruent number.

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, 2136852 + ... + 2137115.

It is an arithmetic number, because the mean of its divisors is an integer number (59835552).

Almost surely, 2^564163644 is an apocalyptic number.

It is an amenable number.

564163644 is an abundant number, since it is smaller than the sum of its proper divisors (871889604).

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

564163644 is a wasteful number, since it uses less digits than its factorization.

564163644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4273985 (or 4273983 counting only the distinct ones).

The product of its digits is 207360, while the sum is 39.

The square root of 564163644 is about 23752.1292519218. The cubic root of 564163644 is about 826.2948232996.

The spelling of 564163644 in words is "five hundred sixty-four million, one hundred sixty-three thousand, six hundred forty-four".