111691615955 has 24 divisors (see below), whose sum is σ = 137613501312. Its totient is φ = 87024960000.

The previous prime is 111691615949. The next prime is 111691615979. The reversal of 111691615955 is 559516196111.

It is not a de Polignac number, because 111691615955 - 2⁴ = 111691615939 is a prime.

It is a Duffinian 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, 5040350 + ... + 5062460.

It is an arithmetic number, because the mean of its divisors is an integer number (5733895888).

Almost surely, 2^111691615955 is an apocalyptic number.

111691615955 is a deficient number, since it is larger than the sum of its proper divisors (25921885357).

111691615955 is an equidigital number, since it uses as much as digits as its factorization.

111691615955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22799 (or 22758 counting only the distinct ones).

The product of its digits is 364500, while the sum is 50.

The spelling of 111691615955 in words is "one hundred eleven billion, six hundred ninety-one million, six hundred fifteen thousand, nine hundred fifty-five".