111885413871 has 32 divisors (see below), whose sum is σ = 186732435456. Its totient is φ = 57890700000.

The previous prime is 111885413813. The next prime is 111885413879. The reversal of 111885413871 is 178314588111.

It is not a de Polignac number, because 111885413871 - 2⁹ = 111885413359 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111885413871.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111885413879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 906865 + ... + 1022826.

It is an arithmetic number, because the mean of its divisors is an integer number (5835388608).

Almost surely, 2^111885413871 is an apocalyptic number.

111885413871 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

111885413871 is a deficient number, since it is larger than the sum of its proper divisors (74847021585).

111885413871 is a wasteful number, since it uses less digits than its factorization.

111885413871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1929963.

The product of its digits is 215040, while the sum is 48.

The spelling of 111885413871 in words is "one hundred eleven billion, eight hundred eighty-five million, four hundred thirteen thousand, eight hundred seventy-one".