18661574275628 has 12 divisors (see below), whose sum is σ = 32741708082720. Its totient is φ = 9306800537712.

The previous prime is 18661574275609. The next prime is 18661574275691. The reversal of 18661574275628 is 82657247516681.

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, 5996648276 + ... + 5996651387.

It is an arithmetic number, because the mean of its divisors is an integer number (2728475673560).

Almost surely, 2^{18661574275628} is an apocalyptic number.

It is an amenable number.

18661574275628 is a deficient number, since it is larger than the sum of its proper divisors (14080133807092).

18661574275628 is a wasteful number, since it uses less digits than its factorization.

18661574275628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11993300056 (or 11993300054 counting only the distinct ones).

The product of its digits is 270950400, while the sum is 68.

The spelling of 18661574275628 in words is "eighteen trillion, six hundred sixty-one billion, five hundred seventy-four million, two hundred seventy-five thousand, six hundred twenty-eight".