111641566556 has 96 divisors (see below), whose sum is σ = 226175846400. Its totient is φ = 47783174400.

The previous prime is 111641566549. The next prime is 111641566579. The reversal of 111641566556 is 655665146111.

It is a happy number.

It is a super-2 number, since 2×111641566556² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 111641566556.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25080131 + ... + 25084581.

It is an arithmetic number, because the mean of its divisors is an integer number (2355998400).

Almost surely, 2^111641566556 is an apocalyptic number.

It is an amenable number.

111641566556 is an abundant number, since it is smaller than the sum of its proper divisors (114534279844).

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

111641566556 is a wasteful number, since it uses less digits than its factorization.

111641566556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5019 (or 5017 counting only the distinct ones).

The product of its digits is 648000, while the sum is 47.

The spelling of 111641566556 in words is "one hundred eleven billion, six hundred forty-one million, five hundred sixty-six thousand, five hundred fifty-six".