11516616564 has 12 divisors (see below), whose sum is σ = 26872105344. Its totient is φ = 3838872184.

The previous prime is 11516616539. The next prime is 11516616613. The reversal of 11516616564 is 46561661511.

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

It is a congruent number.

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, 479859012 + ... + 479859035.

It is an arithmetic number, because the mean of its divisors is an integer number (2239342112).

Almost surely, 2^11516616564 is an apocalyptic number.

It is an amenable number.

11516616564 is an abundant number, since it is smaller than the sum of its proper divisors (15355488780).

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

11516616564 is a wasteful number, since it uses less digits than its factorization.

11516616564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 959718054 (or 959718052 counting only the distinct ones).

The product of its digits is 129600, while the sum is 42.

The spelling of 11516616564 in words is "eleven billion, five hundred sixteen million, six hundred sixteen thousand, five hundred sixty-four".