111664520 has 128 divisors (see below), whose sum is σ = 297129600. Its totient is φ = 37428480.

The previous prime is 111664519. The next prime is 111664537. The reversal of 111664520 is 25466111.

It is a self number, because there is not a number n which added to its sum of digits gives 111664520.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3017942 + ... + 3017978.

It is an arithmetic number, because the mean of its divisors is an integer number (2321325).

Almost surely, 2^111664520 is an apocalyptic number.

111664520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111664520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (148564800).

111664520 is an abundant number, since it is smaller than the sum of its proper divisors (185465080).

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

111664520 is a wasteful number, since it uses less digits than its factorization.

111664520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116 (or 74 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 111664520 is about 10567.1434172155. The cubic root of 111664520 is about 481.5466890398.

The spelling of 111664520 in words is "one hundred eleven million, six hundred sixty-four thousand, five hundred twenty".