564505685 has 4 divisors (see below), whose sum is σ = 677406828. Its totient is φ = 451604544.

The previous prime is 564505681. The next prime is 564505717. The reversal of 564505685 is 586505465.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 393863716 + 170641969 = 19846^2 + 13063^2 .

It is a cyclic number.

It is not a de Polignac number, because 564505685 - 2² = 564505681 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 (564505681) 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, 56450564 + ... + 56450573.

It is an arithmetic number, because the mean of its divisors is an integer number (169351707).

Almost surely, 2^564505685 is an apocalyptic number.

It is an amenable number.

564505685 is a deficient number, since it is larger than the sum of its proper divisors (112901143).

564505685 is a wasteful number, since it uses less digits than its factorization.

564505685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112901142.

The product of its (nonzero) digits is 720000, while the sum is 44.

The square root of 564505685 is about 23759.3283785548. The cubic root of 564505685 is about 826.4617781734.

The spelling of 564505685 in words is "five hundred sixty-four million, five hundred five thousand, six hundred eighty-five".