111665606500 has 96 divisors (see below), whose sum is σ = 279711694080. Its totient is φ = 38148768000.

The previous prime is 111665606489. The next prime is 111665606519. The reversal of 111665606500 is 5606566111.

It is a self number, because there is not a number n which added to its sum of digits gives 111665606500.

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, 926731 + ... + 1040269.

It is an arithmetic number, because the mean of its divisors is an integer number (2913663480).

Almost surely, 2^111665606500 is an apocalyptic number.

111665606500 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 111665606500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (139855847040).

111665606500 is an abundant number, since it is smaller than the sum of its proper divisors (168046087580).

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

111665606500 is a wasteful number, since it uses less digits than its factorization.

111665606500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113846 (or 113834 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 37.

The spelling of 111665606500 in words is "one hundred eleven billion, six hundred sixty-five million, six hundred six thousand, five hundred".