111719394378 has 12 divisors (see below), whose sum is σ = 242058687858. Its totient is φ = 37239798120.

The previous prime is 111719394331. The next prime is 111719394403. The reversal of 111719394378 is 873493917111.

It is a happy number.

111719394378 is a `hidden beast` number, since 1 + 1 + 17 + 193 + 9 + 437 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 77124510369 + 34594884009 = 277713^2 + 185997^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3103316493 + ... + 3103316528.

Almost surely, 2^111719394378 is an apocalyptic number.

111719394378 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

111719394378 is an abundant number, since it is smaller than the sum of its proper divisors (130339293480).

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

111719394378 is a wasteful number, since it uses less digits than its factorization.

111719394378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6206633029 (or 6206633026 counting only the distinct ones).

The product of its digits is 1143072, while the sum is 54.

The spelling of 111719394378 in words is "one hundred eleven billion, seven hundred nineteen million, three hundred ninety-four thousand, three hundred seventy-eight".