11638479532172 has 24 divisors (see below), whose sum is σ = 20679178383360. Its totient is φ = 5730341067920.

The previous prime is 11638479532171. The next prime is 11638479532177. The reversal of 11638479532172 is 27123597483611.

It is not an unprimeable number, because it can be changed into a prime (11638479532171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24541772 + ... + 25011507.

It is an arithmetic number, because the mean of its divisors is an integer number (861632432640).

Almost surely, 2^{11638479532172} is an apocalyptic number.

It is an amenable number.

11638479532172 is a deficient number, since it is larger than the sum of its proper divisors (9040698851188).

11638479532172 is a wasteful number, since it uses less digits than its factorization.

11638479532172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49554181 (or 49554179 counting only the distinct ones).

The product of its digits is 15240960, while the sum is 59.

The spelling of 11638479532172 in words is "eleven trillion, six hundred thirty-eight billion, four hundred seventy-nine million, five hundred thirty-two thousand, one hundred seventy-two".