12641358836 has 6 divisors (see below), whose sum is σ = 22122377970. Its totient is φ = 6320679416.

The previous prime is 12641358823. The next prime is 12641358841. The reversal of 12641358836 is 63885314621.

It can be written as a sum of positive squares in only one way, i.e., 12635108836 + 6250000 = 112406^2 + 2500^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1580169851 + ... + 1580169858.

It is an arithmetic number, because the mean of its divisors is an integer number (3687062995).

Almost surely, 2^12641358836 is an apocalyptic number.

It is an amenable number.

12641358836 is a deficient number, since it is larger than the sum of its proper divisors (9481019134).

12641358836 is a wasteful number, since it uses less digits than its factorization.

12641358836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3160339713 (or 3160339711 counting only the distinct ones).

The product of its digits is 829440, while the sum is 47.

The spelling of 12641358836 in words is "twelve billion, six hundred forty-one million, three hundred fifty-eight thousand, eight hundred thirty-six".