11515661136 has 120 divisors (see below), whose sum is σ = 38196069184. Its totient is φ = 3290181120.

The previous prime is 11515661099. The next prime is 11515661141. The reversal of 11515661136 is 63116651511.

11515661136 is a `hidden beast` number, since 1 + 1 + 5 + 1 + 5 + 6 + 611 + 36 = 666.

It is a super-2 number, since 2×11515661136² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 11515661136.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 184345 + ... + 238776.

Almost surely, 2^11515661136 is an apocalyptic number.

11515661136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

11515661136 is an abundant number, since it is smaller than the sum of its proper divisors (26680408048).

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

11515661136 is an equidigital number, since it uses as much as digits as its factorization.

11515661136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423151 (or 423133 counting only the distinct ones).

The product of its digits is 16200, while the sum is 36.

The spelling of 11515661136 in words is "eleven billion, five hundred fifteen million, six hundred sixty-one thousand, one hundred thirty-six".