12639657242 has 8 divisors (see below), whose sum is σ = 19957353600. Its totient is φ = 5987206044.

The previous prime is 12639657229. The next prime is 12639657293. The reversal of 12639657242 is 24275693621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166311242 + ... + 166311317.

It is an arithmetic number, because the mean of its divisors is an integer number (2494669200).

Almost surely, 2^12639657242 is an apocalyptic number.

12639657242 is a deficient number, since it is larger than the sum of its proper divisors (7317696358).

12639657242 is a wasteful number, since it uses less digits than its factorization.

12639657242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332622580.

The product of its digits is 1088640, while the sum is 47.

The spelling of 12639657242 in words is "twelve billion, six hundred thirty-nine million, six hundred fifty-seven thousand, two hundred forty-two".