111668879815 has 16 divisors (see below), whose sum is σ = 137332562976. Its totient is φ = 87117120000.

The previous prime is 111668879789. The next prime is 111668879831. The reversal of 111668879815 is 518978866111.

It is not a de Polignac number, because 111668879815 - 2¹¹ = 111668877767 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 340459 + ... + 582451.

It is an arithmetic number, because the mean of its divisors is an integer number (8583285186).

Almost surely, 2^111668879815 is an apocalyptic number.

111668879815 is a deficient number, since it is larger than the sum of its proper divisors (25663683161).

111668879815 is a wasteful number, since it uses less digits than its factorization.

111668879815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244290.

The product of its digits is 5806080, while the sum is 61.

The spelling of 111668879815 in words is "one hundred eleven billion, six hundred sixty-eight million, eight hundred seventy-nine thousand, eight hundred fifteen".