11643564 has 12 divisors (see below), whose sum is σ = 27168344. Its totient is φ = 3881184.

The previous prime is 11643563. The next prime is 11643571. The reversal of 11643564 is 46534611.

11643564 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (11643563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 485137 + ... + 485160.

Almost surely, 2^11643564 is an apocalyptic number.

It is an amenable number.

11643564 is an abundant number, since it is smaller than the sum of its proper divisors (15524780).

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

11643564 is a wasteful number, since it uses less digits than its factorization.

11643564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 970304 (or 970302 counting only the distinct ones).

The product of its digits is 8640, while the sum is 30.

The square root of 11643564 is about 3412.2666953215. The cubic root of 11643564 is about 226.6532642979.

The spelling of 11643564 in words is "eleven million, six hundred forty-three thousand, five hundred sixty-four".