111866829872 has 120 divisors (see below), whose sum is σ = 265889678400. Its totient is φ = 45335541888.

The previous prime is 111866829827. The next prime is 111866829887. The reversal of 111866829872 is 278928668111.

111866829872 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×111866829872² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8379779 + ... + 8393117.

It is an arithmetic number, because the mean of its divisors is an integer number (2215747320).

Almost surely, 2^111866829872 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 111866829872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132944839200).

111866829872 is an abundant number, since it is smaller than the sum of its proper divisors (154022848528).

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

111866829872 is a wasteful number, since it uses less digits than its factorization.

111866829872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13943 (or 13930 counting only the distinct ones).

The product of its digits is 4644864, while the sum is 59.

The spelling of 111866829872 in words is "one hundred eleven billion, eight hundred sixty-six million, eight hundred twenty-nine thousand, eight hundred seventy-two".