12661112002624 has 56 divisors (see below), whose sum is σ = 27519620414040. Its totient is φ = 5752716189696.

The previous prime is 12661112002589. The next prime is 12661112002639. The reversal of 12661112002624 is 42620021116621.

It can be written as a sum of positive squares in 4 ways, for example, as 2234929321024 + 10426182681600 = 1494968^2 + 3228960^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a self number, because there is not a number n which added to its sum of digits gives 12661112002624.

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, 200607267 + ... + 200670370.

Almost surely, 2^{12661112002624} is an apocalyptic number.

It is an amenable number.

12661112002624 is an abundant number, since it is smaller than the sum of its proper divisors (14858508411416).

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

12661112002624 is a wasteful number, since it uses less digits than its factorization.

12661112002624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401277695 (or 401277685 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The spelling of 12661112002624 in words is "twelve trillion, six hundred sixty-one billion, one hundred twelve million, two thousand, six hundred twenty-four".