111678206887 has 16 divisors (see below), whose sum is σ = 123173120448. Its totient is φ = 100618352640.

The previous prime is 111678206833. The next prime is 111678206909. The reversal of 111678206887 is 788602876111.

It is not a de Polignac number, because 111678206887 - 2¹⁵ = 111678174119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111678206587) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 286939 + ... + 552892.

It is an arithmetic number, because the mean of its divisors is an integer number (7698320028).

Almost surely, 2^111678206887 is an apocalyptic number.

111678206887 is a deficient number, since it is larger than the sum of its proper divisors (11494913561).

111678206887 is a wasteful number, since it uses less digits than its factorization.

111678206887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 840090.

The product of its (nonzero) digits is 1806336, while the sum is 55.

The spelling of 111678206887 in words is "one hundred eleven billion, six hundred seventy-eight million, two hundred six thousand, eight hundred eighty-seven".