11638684562872 has 64 divisors (see below), whose sum is σ = 23078631260160. Its totient is φ = 5493617683200.

The previous prime is 11638684562863. The next prime is 11638684562893. The reversal of 11638684562872 is 27826548683611.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 11638684562798 and 11638684562807.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92496433 + ... + 92622175.

It is an arithmetic number, because the mean of its divisors is an integer number (360603613440).

Almost surely, 2^{11638684562872} is an apocalyptic number.

It is an amenable number.

11638684562872 is a deficient number, since it is larger than the sum of its proper divisors (11439946697288).

11638684562872 is a wasteful number, since it uses less digits than its factorization.

11638684562872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134924 (or 134920 counting only the distinct ones).

The product of its digits is 185794560, while the sum is 67.

The spelling of 11638684562872 in words is "eleven trillion, six hundred thirty-eight billion, six hundred eighty-four million, five hundred sixty-two thousand, eight hundred seventy-two".