564601621 has 16 divisors (see below), whose sum is σ = 582465600. Its totient is φ = 547089408.

The previous prime is 564601613. The next prime is 564601651. The reversal of 564601621 is 126106465.

It is a cyclic number.

It is not a de Polignac number, because 564601621 - 2³ = 564601613 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 (564601651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2038135 + ... + 2038411.

It is an arithmetic number, because the mean of its divisors is an integer number (36404100).

Almost surely, 2^564601621 is an apocalyptic number.

It is an amenable number.

564601621 is a deficient number, since it is larger than the sum of its proper divisors (17863979).

564601621 is a wasteful number, since it uses less digits than its factorization.

564601621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 708.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 564601621 is about 23761.3472050724. The cubic root of 564601621 is about 826.5085937315.

It can be divided in two parts, 56460 and 1621, that added together give a square (58081 = 241²).

The spelling of 564601621 in words is "five hundred sixty-four million, six hundred one thousand, six hundred twenty-one".