564916638 has 48 divisors (see below), whose sum is σ = 1334676096. Its totient is φ = 158015520.

The previous prime is 564916637. The next prime is 564916657. The reversal of 564916638 is 836619465.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (564916631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14170 + ... + 36477.

It is an arithmetic number, because the mean of its divisors is an integer number (27805752).

Almost surely, 2^564916638 is an apocalyptic number.

564916638 is an abundant number, since it is smaller than the sum of its proper divisors (769759458).

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

564916638 is a wasteful number, since it uses less digits than its factorization.

564916638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50689 (or 50676 counting only the distinct ones).

The product of its digits is 933120, while the sum is 48.

The square root of 564916638 is about 23767.9750504750. The cubic root of 564916638 is about 826.6622807679.

The spelling of 564916638 in words is "five hundred sixty-four million, nine hundred sixteen thousand, six hundred thirty-eight".