12939215806878 has 16 divisors (see below), whose sum is σ = 25878466932240. Its totient is φ = 4313066049216.

The previous prime is 12939215806871. The next prime is 12939215806931. The reversal of 12939215806878 is 87860851293921.

12939215806878 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×12939215806878² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12939215806871) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7474458 + ... + 9041346.

It is an arithmetic number, because the mean of its divisors is an integer number (1617404183265).

Almost surely, 2^{12939215806878} is an apocalyptic number.

12939215806878 is an abundant number, since it is smaller than the sum of its proper divisors (12939251125362).

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

12939215806878 is a wasteful number, since it uses less digits than its factorization.

12939215806878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2943211.

The product of its (nonzero) digits is 104509440, while the sum is 69.

The spelling of 12939215806878 in words is "twelve trillion, nine hundred thirty-nine billion, two hundred fifteen million, eight hundred six thousand, eight hundred seventy-eight".