111671639244 has 144 divisors (see below), whose sum is σ = 316757226240. Its totient is φ = 32874145920.

The previous prime is 111671639231. The next prime is 111671639263. The reversal of 111671639244 is 442936176111.

111671639244 is a `hidden beast` number, since 1 + 1 + 1 + 6 + 7 + 1 + 639 + 2 + 4 + 4 = 666.

It is a super-2 number, since 2×111671639244² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 111671639244.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10001737 + ... + 10012895.

It is an arithmetic number, because the mean of its divisors is an integer number (2199702960).

Almost surely, 2^111671639244 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111671639244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (158378613120).

111671639244 is an abundant number, since it is smaller than the sum of its proper divisors (205085586996).

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

111671639244 is a wasteful number, since it uses less digits than its factorization.

111671639244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11900 (or 11895 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

It can be divided in two parts, 1116716 and 39244, that added together give a triangular number (1155960 = T₁₅₂₀).

The spelling of 111671639244 in words is "one hundred eleven billion, six hundred seventy-one million, six hundred thirty-nine thousand, two hundred forty-four".