111162639861 has 48 divisors (see below), whose sum is σ = 197688516480. Its totient is φ = 58615643520.

The previous prime is 111162639857. The next prime is 111162639869. The reversal of 111162639861 is 168936261111.

111162639861 is a `hidden beast` number, since 1 + 1 + 1 + 1 + 6 + 2 + 639 + 8 + 6 + 1 = 666.

It is not a de Polignac number, because 111162639861 - 2² = 111162639857 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111162639869) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2616930 + ... + 2659068.

It is an arithmetic number, because the mean of its divisors is an integer number (4118510760).

Almost surely, 2^111162639861 is an apocalyptic number.

It is an amenable number.

111162639861 is a deficient number, since it is larger than the sum of its proper divisors (86525876619).

111162639861 is a wasteful number, since it uses less digits than its factorization.

111162639861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45386 (or 45383 counting only the distinct ones).

The product of its digits is 93312, while the sum is 45.

The spelling of 111162639861 in words is "one hundred eleven billion, one hundred sixty-two million, six hundred thirty-nine thousand, eight hundred sixty-one".