12639293621 has 8 divisors (see below), whose sum is σ = 12781783200. Its totient is φ = 12497144400.

The previous prime is 12639293617. The next prime is 12639293651.

12639293621 is nontrivially palindromic in base 10.

12639293621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 12639293621 - 2² = 12639293617 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12639293651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10031 + ... + 159308.

It is an arithmetic number, because the mean of its divisors is an integer number (1597722900).

Almost surely, 2^12639293621 is an apocalyptic number.

It is an amenable number.

12639293621 is a deficient number, since it is larger than the sum of its proper divisors (142489579).

12639293621 is a wasteful number, since it uses less digits than its factorization.

12639293621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170179.

The product of its digits is 209952, while the sum is 44.

The spelling of 12639293621 in words is "twelve billion, six hundred thirty-nine million, two hundred ninety-three thousand, six hundred twenty-one".