111381091656 has 16 divisors (see below), whose sum is σ = 278452729200. Its totient is φ = 37127030544.

The previous prime is 111381091649. The next prime is 111381091673. The reversal of 111381091656 is 656190183111.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2320439386 + ... + 2320439433.

It is an arithmetic number, because the mean of its divisors is an integer number (17403295575).

Almost surely, 2^111381091656 is an apocalyptic number.

It is an amenable number.

111381091656 is an abundant number, since it is smaller than the sum of its proper divisors (167071637544).

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

111381091656 is a wasteful number, since it uses less digits than its factorization.

111381091656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4640878828 (or 4640878824 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 42.

The spelling of 111381091656 in words is "one hundred eleven billion, three hundred eighty-one million, ninety-one thousand, six hundred fifty-six".