564204561 has 4 divisors (see below), whose sum is σ = 752272752. Its totient is φ = 376136372.

The previous prime is 564204547. The next prime is 564204569. The reversal of 564204561 is 165402465.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 564204561 - 2²¹ = 562107409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (564204569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94034091 + ... + 94034096.

It is an arithmetic number, because the mean of its divisors is an integer number (188068188).

Almost surely, 2^564204561 is an apocalyptic number.

It is an amenable number.

564204561 is a deficient number, since it is larger than the sum of its proper divisors (188068191).

564204561 is a wasteful number, since it uses less digits than its factorization.

564204561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188068190.

The product of its (nonzero) digits is 28800, while the sum is 33.

The square root of 564204561 is about 23752.9905696104. The cubic root of 564204561 is about 826.3147989977.

The spelling of 564204561 in words is "five hundred sixty-four million, two hundred four thousand, five hundred sixty-one".