111163931928 has 512 divisors, whose sum is σ = 384768000000. Its totient is φ = 29658908160.

The previous prime is 111163931891. The next prime is 111163931947. The reversal of 111163931928 is 829139361111.

111163931928 is a `hidden beast` number, since 1 + 1 + 1 + 1 + 639 + 3 + 1 + 9 + 2 + 8 = 666.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 66604278 + ... + 66605946.

It is an arithmetic number, because the mean of its divisors is an integer number (751500000).

Almost surely, 2^111163931928 is an apocalyptic number.

111163931928 is a gapful number since it is divisible by the number (18) 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 111163931928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (192384000000).

111163931928 is an abundant number, since it is smaller than the sum of its proper divisors (273604068072).

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

111163931928 is a wasteful number, since it uses less digits than its factorization.

111163931928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1765 (or 1741 counting only the distinct ones).

The product of its digits is 69984, while the sum is 45.

The spelling of 111163931928 in words is "one hundred eleven billion, one hundred sixty-three million, nine hundred thirty-one thousand, nine hundred twenty-eight".