11661613116 has 48 divisors (see below), whose sum is σ = 28064655360. Its totient is φ = 3766811200.

The previous prime is 11661613049. The next prime is 11661613123. The reversal of 11661613116 is 61131616611.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

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, 45396 + ... + 159323.

It is an arithmetic number, because the mean of its divisors is an integer number (584680320).

Almost surely, 2^11661613116 is an apocalyptic number.

It is an amenable number.

11661613116 is an abundant number, since it is smaller than the sum of its proper divisors (16403042244).

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

11661613116 is a wasteful number, since it uses less digits than its factorization.

11661613116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204874 (or 204872 counting only the distinct ones).

The product of its digits is 3888, while the sum is 33.

The spelling of 11661613116 in words is "eleven billion, six hundred sixty-one million, six hundred thirteen thousand, one hundred sixteen".