565766636820864 has 64 divisors (see below), whose sum is σ = 1502824800290880. Its totient is φ = 188587979020800.

The previous prime is 565766636820863. The next prime is 565766636820877. The reversal of 565766636820864 is 468028636667565.

It is a tau number, because it is divible by the number of its divisors (64).

It is a self number, because there is not a number n which added to its sum of digits gives 565766636820864.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (565766636820863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79617819 + ... + 86432229.

It is an arithmetic number, because the mean of its divisors is an integer number (23481637504545).

Almost surely, 2^{565766636820864} is an apocalyptic number.

It is an amenable number.

565766636820864 is an abundant number, since it is smaller than the sum of its proper divisors (937058163470016).

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

565766636820864 is a wasteful number, since it uses less digits than its factorization.

565766636820864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7030639 (or 7030627 counting only the distinct ones).

The product of its (nonzero) digits is 12541132800, while the sum is 78.

The spelling of 565766636820864 in words is "five hundred sixty-five trillion, seven hundred sixty-six billion, six hundred thirty-six million, eight hundred twenty thousand, eight hundred sixty-four".