11564443564 has 24 divisors (see below), whose sum is σ = 21422514960. Its totient is φ = 5452999104.

The previous prime is 11564443543. The next prime is 11564443571. The reversal of 11564443564 is 46534446511.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a self number, because there is not a number n which added to its sum of digits gives 11564443564.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1154239 + ... + 1164214.

It is an arithmetic number, because the mean of its divisors is an integer number (892604790).

Almost surely, 2^11564443564 is an apocalyptic number.

It is an amenable number.

11564443564 is a deficient number, since it is larger than the sum of its proper divisors (9858071396).

11564443564 is a wasteful number, since it uses less digits than its factorization.

11564443564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2318529 (or 2318527 counting only the distinct ones).

The product of its digits is 691200, while the sum is 43.

The spelling of 11564443564 in words is "eleven billion, five hundred sixty-four million, four hundred forty-three thousand, five hundred sixty-four".