12786456678 has 64 divisors (see below), whose sum is σ = 26261452800. Its totient is φ = 4149325440.

The previous prime is 12786456629. The next prime is 12786456691. The reversal of 12786456678 is 87665468721.

12786456678 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13587688 + ... + 13588628.

It is an arithmetic number, because the mean of its divisors is an integer number (410335200).

Almost surely, 2^12786456678 is an apocalyptic number.

12786456678 is an abundant number, since it is smaller than the sum of its proper divisors (13474996122).

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

12786456678 is a wasteful number, since it uses less digits than its factorization.

12786456678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1397.

The product of its digits is 27095040, while the sum is 60.

The spelling of 12786456678 in words is "twelve billion, seven hundred eighty-six million, four hundred fifty-six thousand, six hundred seventy-eight".