111816957870 has 384 divisors, whose sum is σ = 330598195200. Its totient is φ = 27119079936.

The previous prime is 111816957799. The next prime is 111816957947. The reversal of 111816957870 is 78759618111.

111816957870 is a `hidden beast` number, since 1 + 1 + 1 + 8 + 1 + 69 + 578 + 7 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 1415404491 + ... + 1415404569.

It is an arithmetic number, because the mean of its divisors is an integer number (860932800).

Almost surely, 2^111816957870 is an apocalyptic number.

111816957870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 111816957870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (165299097600).

111816957870 is an abundant number, since it is smaller than the sum of its proper divisors (218781237330).

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

111816957870 is an frugal number, since it uses more digits than its factorization.

111816957870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183 (or 153 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 54.

The spelling of 111816957870 in words is "one hundred eleven billion, eight hundred sixteen million, nine hundred fifty-seven thousand, eight hundred seventy".