111691357955 has 4 divisors (see below), whose sum is σ = 134029629552. Its totient is φ = 89353086360.

The previous prime is 111691357933. The next prime is 111691358021. The reversal of 111691357955 is 559753196111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 559753196111 = 75367 ⋅7427033.

It is not a de Polignac number, because 111691357955 - 2¹² = 111691353859 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111691357897 and 111691357906.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11169135791 + ... + 11169135800.

It is an arithmetic number, because the mean of its divisors is an integer number (33507407388).

Almost surely, 2^111691357955 is an apocalyptic number.

111691357955 is a deficient number, since it is larger than the sum of its proper divisors (22338271597).

111691357955 is an equidigital number, since it uses as much as digits as its factorization.

111691357955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22338271596.

The product of its digits is 1275750, while the sum is 53.

The spelling of 111691357955 in words is "one hundred eleven billion, six hundred ninety-one million, three hundred fifty-seven thousand, nine hundred fifty-five".