111611604 has 48 divisors (see below), whose sum is σ = 290142720. Its totient is φ = 33156480.

The previous prime is 111611603. The next prime is 111611629. The reversal of 111611604 is 406116111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111611603) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7812 + ... + 16859.

It is an arithmetic number, because the mean of its divisors is an integer number (6044640).

Almost surely, 2^111611604 is an apocalyptic number.

It is an amenable number.

111611604 is an abundant number, since it is smaller than the sum of its proper divisors (178531116).

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

111611604 is a wasteful number, since it uses less digits than its factorization.

111611604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24720 (or 24718 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 111611604 is about 10564.6393218131. The cubic root of 111611604 is about 481.4706113063.

Adding to 111611604 its reverse (406116111), we get a palindrome (517727715).

It can be divided in two parts, 1116 and 11604, that added together give a triangular number (12720 = T₁₅₉).

The spelling of 111611604 in words is "one hundred eleven million, six hundred eleven thousand, six hundred four".