111723823878 has 64 divisors (see below), whose sum is σ = 226739761920. Its totient is φ = 36697213952.

The previous prime is 111723823873. The next prime is 111723823891. The reversal of 111723823878 is 878328327111.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 111723823878.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111723823873) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 138100738 + ... + 138101546.

It is an arithmetic number, because the mean of its divisors is an integer number (3542808780).

Almost surely, 2^111723823878 is an apocalyptic number.

111723823878 is an abundant number, since it is smaller than the sum of its proper divisors (115015938042).

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

111723823878 is a wasteful number, since it uses less digits than its factorization.

111723823878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1861.

The product of its digits is 903168, while the sum is 51.

The spelling of 111723823878 in words is "one hundred eleven billion, seven hundred twenty-three million, eight hundred twenty-three thousand, eight hundred seventy-eight".