12639238878 has 16 divisors (see below), whose sum is σ = 28889688960. Its totient is φ = 3611211096.

The previous prime is 12639238861. The next prime is 12639238883. The reversal of 12639238878 is 87883293621.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150467088 + ... + 150467171.

It is an arithmetic number, because the mean of its divisors is an integer number (1805605560).

Almost surely, 2^12639238878 is an apocalyptic number.

12639238878 is an abundant number, since it is smaller than the sum of its proper divisors (16250450082).

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

12639238878 is a wasteful number, since it uses less digits than its factorization.

12639238878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300934271.

The product of its digits is 6967296, while the sum is 57.

The spelling of 12639238878 in words is "twelve billion, six hundred thirty-nine million, two hundred thirty-eight thousand, eight hundred seventy-eight".