111378231691688 has 64 divisors (see below), whose sum is σ = 230864965094400. Its totient is φ = 50059367953920.

The previous prime is 111378231691687. The next prime is 111378231691691. The reversal of 111378231691688 is 886196132873111.

It is a super-2 number, since 2×111378231691688² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (111378231691687) 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 15 ways as a sum of consecutive naturals, for example, 92251328 + ... + 93450863.

It is an arithmetic number, because the mean of its divisors is an integer number (3607265079600).

Almost surely, 2^{111378231691688} is an apocalyptic number.

It is an amenable number.

111378231691688 is an abundant number, since it is smaller than the sum of its proper divisors (119486733402712).

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

111378231691688 is a wasteful number, since it uses less digits than its factorization.

111378231691688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185702362 (or 185702358 counting only the distinct ones).

The product of its digits is 20901888, while the sum is 65.

The spelling of 111378231691688 in words is "one hundred eleven trillion, three hundred seventy-eight billion, two hundred thirty-one million, six hundred ninety-one thousand, six hundred eighty-eight".