23564605656 has 32 divisors (see below), whose sum is σ = 61472885760. Its totient is φ = 7513352352.

The previous prime is 23564605583. The next prime is 23564605667. The reversal of 23564605656 is 65650646532.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21344200 + ... + 21345303.

It is an arithmetic number, because the mean of its divisors is an integer number (1921027680).

Almost surely, 2^23564605656 is an apocalyptic number.

It is an amenable number.

23564605656 is an abundant number, since it is smaller than the sum of its proper divisors (37908280104).

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

23564605656 is a wasteful number, since it uses less digits than its factorization.

23564605656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42689535 (or 42689531 counting only the distinct ones).

The product of its (nonzero) digits is 3888000, while the sum is 48.

The spelling of 23564605656 in words is "twenty-three billion, five hundred sixty-four million, six hundred five thousand, six hundred fifty-six".