111289857959 has 12 divisors (see below), whose sum is σ = 129686387688. Its totient is φ = 95224222800.

The previous prime is 111289857947. The next prime is 111289857983. The reversal of 111289857959 is 959758982111.

It is not a de Polignac number, because 111289857959 - 2¹² = 111289853863 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111289857895 and 111289857904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111289857359) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1960832 + ... + 2016789.

It is an arithmetic number, because the mean of its divisors is an integer number (10807198974).

Almost surely, 2^111289857959 is an apocalyptic number.

111289857959 is a deficient number, since it is larger than the sum of its proper divisors (18396529729).

111289857959 is an equidigital number, since it uses as much as digits as its factorization.

111289857959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3978206 (or 3978199 counting only the distinct ones).

The product of its digits is 16329600, while the sum is 65.

The spelling of 111289857959 in words is "one hundred eleven billion, two hundred eighty-nine million, eight hundred fifty-seven thousand, nine hundred fifty-nine".