12878877639138 has 16 divisors (see below), whose sum is σ = 29437434603840. Its totient is φ = 3679679325456.

The previous prime is 12878877639119. The next prime is 12878877639193. The reversal of 12878877639138 is 83193677887821.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153319971853 + ... + 153319971936.

It is an arithmetic number, because the mean of its divisors is an integer number (1839839662740).

Almost surely, 2^{12878877639138} is an apocalyptic number.

12878877639138 is an abundant number, since it is smaller than the sum of its proper divisors (16558556964702).

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

12878877639138 is a wasteful number, since it uses less digits than its factorization.

12878877639138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306639943801.

The product of its digits is 1365590016, while the sum is 78.

The spelling of 12878877639138 in words is "twelve trillion, eight hundred seventy-eight billion, eight hundred seventy-seven million, six hundred thirty-nine thousand, one hundred thirty-eight".