11645623564 has 12 divisors (see below), whose sum is σ = 21452464600. Its totient is φ = 5516347968.

The previous prime is 11645623531. The next prime is 11645623573. The reversal of 11645623564 is 46532654611.

It is a self number, because there is not a number n which added to its sum of digits gives 11645623564.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76615869 + ... + 76616020.

Almost surely, 2^11645623564 is an apocalyptic number.

It is an amenable number.

11645623564 is a deficient number, since it is larger than the sum of its proper divisors (9806841036).

11645623564 is a wasteful number, since it uses less digits than its factorization.

11645623564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153231912 (or 153231910 counting only the distinct ones).

The product of its digits is 518400, while the sum is 43.

It can be divided in two parts, 11645 and 623564, that added together give a square (635209 = 797²).

The spelling of 11645623564 in words is "eleven billion, six hundred forty-five million, six hundred twenty-three thousand, five hundred sixty-four".