111687418644 has 24 divisors (see below), whose sum is σ = 260621161920. Its totient is φ = 37226684544.

The previous prime is 111687418643. The next prime is 111687418663. The reversal of 111687418644 is 446814786111.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111687418643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112389 + ... + 485804.

It is an arithmetic number, because the mean of its divisors is an integer number (10859215080).

Almost surely, 2^111687418644 is an apocalyptic number.

It is an amenable number.

111687418644 is an abundant number, since it is smaller than the sum of its proper divisors (148933743276).

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

111687418644 is a wasteful number, since it uses less digits than its factorization.

111687418644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 613759 (or 613757 counting only the distinct ones).

The product of its digits is 1032192, while the sum is 51.

The spelling of 111687418644 in words is "one hundred eleven billion, six hundred eighty-seven million, four hundred eighteen thousand, six hundred forty-four".