111385885638 has 16 divisors (see below), whose sum is σ = 228205229616. Its totient is φ = 36223052160.

The previous prime is 111385885609. The next prime is 111385885643. The reversal of 111385885638 is 836588583111.

It is a super-2 number, since 2×111385885638² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 226393831 + ... + 226394322.

It is an arithmetic number, because the mean of its divisors is an integer number (14262826851).

Almost surely, 2^111385885638 is an apocalyptic number.

111385885638 is an abundant number, since it is smaller than the sum of its proper divisors (116819343978).

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

111385885638 is a wasteful number, since it uses less digits than its factorization.

111385885638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452788199.

The product of its digits is 5529600, while the sum is 57.

The spelling of 111385885638 in words is "one hundred eleven billion, three hundred eighty-five million, eight hundred eighty-five thousand, six hundred thirty-eight".