56563436565 has 16 divisors (see below), whose sum is σ = 100557220800. Its totient is φ = 30167166096.

The previous prime is 56563436561. The next prime is 56563436621.

56563436565 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 56563436565 - 2² = 56563436561 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56563436561) 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 15 ways as a sum of consecutive naturals, for example, 209494075 + ... + 209494344.

It is an arithmetic number, because the mean of its divisors is an integer number (6284826300).

Almost surely, 2^56563436565 is an apocalyptic number.

It is an amenable number.

56563436565 is a deficient number, since it is larger than the sum of its proper divisors (43993784235).

56563436565 is a wasteful number, since it uses less digits than its factorization.

56563436565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418988433 (or 418988427 counting only the distinct ones).

The product of its digits is 29160000, while the sum is 54.

The spelling of 56563436565 in words is "fifty-six billion, five hundred sixty-three million, four hundred thirty-six thousand, five hundred sixty-five".