18183315331656 has 48 divisors (see below), whose sum is σ = 50175657883260. Its totient is φ = 5946744635520.

The previous prime is 18183315331567. The next prime is 18183315331661. The reversal of 18183315331656 is 65613351338181.

18183315331656 is a `hidden beast` number, since 1 + 8 + 1 + 8 + 3 + 315 + 3 + 316 + 5 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 13923838509156 + 4259476822500 = 3731466^2 + 2063850^2 .

It is a super-2 number, since 2×18183315331656² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2382506055 + ... + 2382513686.

Almost surely, 2^{18183315331656} is an apocalyptic number.

It is an amenable number.

18183315331656 is an abundant number, since it is smaller than the sum of its proper divisors (31992342551604).

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

18183315331656 is a wasteful number, since it uses less digits than its factorization.

18183315331656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4765019806 (or 4765019799 counting only the distinct ones).

The product of its digits is 4665600, while the sum is 54.

The spelling of 18183315331656 in words is "eighteen trillion, one hundred eighty-three billion, three hundred fifteen million, three hundred thirty-one thousand, six hundred fifty-six".