111640044564 has 72 divisors (see below), whose sum is σ = 283503467520. Its totient is φ = 37041883200.

The previous prime is 111640044553. The next prime is 111640044569. The reversal of 111640044564 is 465440046111.

111640044564 is a `hidden beast` number, since 1 + 1 + 1 + 640 + 0 + 4 + 4 + 5 + 6 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111640044569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11985469 + ... + 11994779.

It is an arithmetic number, because the mean of its divisors is an integer number (3937548160).

Almost surely, 2^111640044564 is an apocalyptic number.

It is an amenable number.

111640044564 is an abundant number, since it is smaller than the sum of its proper divisors (171863422956).

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

111640044564 is a wasteful number, since it uses less digits than its factorization.

111640044564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10821 (or 10816 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The spelling of 111640044564 in words is "one hundred eleven billion, six hundred forty million, forty-four thousand, five hundred sixty-four".