111813973423978 has 16 divisors (see below), whose sum is σ = 191788241610240. Its totient is φ = 47893488246576.

The previous prime is 111813973423849. The next prime is 111813973424063. The reversal of 111813973423978 is 879324379318111.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2232147226 + ... + 2232197317.

It is an arithmetic number, because the mean of its divisors is an integer number (11986765100640).

Almost surely, 2^{111813973423978} is an apocalyptic number.

111813973423978 is a deficient number, since it is larger than the sum of its proper divisors (79974268186262).

111813973423978 is a wasteful number, since it uses less digits than its factorization.

111813973423978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4464346341.

The product of its digits is 54867456, while the sum is 67.

The spelling of 111813973423978 in words is "one hundred eleven trillion, eight hundred thirteen billion, nine hundred seventy-three million, four hundred twenty-three thousand, nine hundred seventy-eight".