11512665564642 has 36 divisors (see below), whose sum is σ = 27417904635030. Its totient is φ = 3488686534080.

The previous prime is 11512665564637. The next prime is 11512665564677. The reversal of 11512665564642 is 24646556621511.

It is a happy number.

11512665564642 is a `hidden beast` number, since 1 + 1 + 5 + 1 + 2 + 6 + 6 + 556 + 46 + 42 = 666.

It can be written as a sum of positive squares in only one way, i.e., 10110167763201 + 1402497801441 = 3179649^2 + 1184271^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2642942167 + ... + 2642946522.

Almost surely, 2^{11512665564642} is an apocalyptic number.

11512665564642 is an abundant number, since it is smaller than the sum of its proper divisors (15905239070388).

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

11512665564642 is a wasteful number, since it uses less digits than its factorization.

11512665564642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5285888719 (or 5285888705 counting only the distinct ones).

The product of its digits is 10368000, while the sum is 54.

The spelling of 11512665564642 in words is "eleven trillion, five hundred twelve billion, six hundred sixty-five million, five hundred sixty-four thousand, six hundred forty-two".