11551166638788 has 48 divisors (see below), whose sum is σ = 30806020187264. Its totient is φ = 3300021630720.

The previous prime is 11551166638747. The next prime is 11551166638813. The reversal of 11551166638788 is 88783666115511.

It is a super-2 number, since 2×11551166638788² (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 15 ways as a sum of consecutive naturals, for example, 5598193 + ... + 7378488.

Almost surely, 2^{11551166638788} is an apocalyptic number.

It is an amenable number.

11551166638788 is an abundant number, since it is smaller than the sum of its proper divisors (19254853548476).

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

11551166638788 is a wasteful number, since it uses less digits than its factorization.

11551166638788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12987292 (or 12987290 counting only the distinct ones).

The product of its digits is 58060800, while the sum is 66.

The spelling of 11551166638788 in words is "eleven trillion, five hundred fifty-one billion, one hundred sixty-six million, six hundred thirty-eight thousand, seven hundred eighty-eight".