12639126404 has 6 divisors (see below), whose sum is σ = 22118471214. Its totient is φ = 6319563200.

The previous prime is 12639126397. The next prime is 12639126427. The reversal of 12639126404 is 40462193621.

It can be written as a sum of positive squares in only one way, i.e., 12209808004 + 429318400 = 110498^2 + 20720^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1579890797 + ... + 1579890804.

It is an arithmetic number, because the mean of its divisors is an integer number (3686411869).

Almost surely, 2^12639126404 is an apocalyptic number.

It is an amenable number.

12639126404 is a deficient number, since it is larger than the sum of its proper divisors (9479344810).

12639126404 is a wasteful number, since it uses less digits than its factorization.

12639126404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3159781605 (or 3159781603 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 38.

The spelling of 12639126404 in words is "twelve billion, six hundred thirty-nine million, one hundred twenty-six thousand, four hundred four".