12686078887 has 16 divisors (see below), whose sum is σ = 13158523872. Its totient is φ = 12223411200.

The previous prime is 12686078869. The next prime is 12686078893. The reversal of 12686078887 is 78887068621.

It is not a de Polignac number, because 12686078887 - 2²⁷ = 12551861159 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 (12686078807) 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, 1191387 + ... + 1201987.

It is an arithmetic number, because the mean of its divisors is an integer number (822407742).

Almost surely, 2^12686078887 is an apocalyptic number.

12686078887 is a deficient number, since it is larger than the sum of its proper divisors (472444985).

12686078887 is a wasteful number, since it uses less digits than its factorization.

12686078887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11058.

The product of its (nonzero) digits is 14450688, while the sum is 61.

The spelling of 12686078887 in words is "twelve billion, six hundred eighty-six million, seventy-eight thousand, eight hundred eighty-seven".