12715517440878 has 64 divisors (see below), whose sum is σ = 30972963962880. Its totient is φ = 3401111035872.

The previous prime is 12715517440793. The next prime is 12715517440919. The reversal of 12715517440878 is 87804471551721.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 139987168 + ... + 140077971.

It is an arithmetic number, because the mean of its divisors is an integer number (483952561920).

Almost surely, 2^{12715517440878} is an apocalyptic number.

12715517440878 is an abundant number, since it is smaller than the sum of its proper divisors (18257446522002).

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

12715517440878 is a wasteful number, since it uses less digits than its factorization.

12715517440878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280065221.

The product of its (nonzero) digits is 17561600, while the sum is 60.

The spelling of 12715517440878 in words is "twelve trillion, seven hundred fifteen billion, five hundred seventeen million, four hundred forty thousand, eight hundred seventy-eight".