12621615239 has 4 divisors (see below), whose sum is σ = 12809997624. Its totient is φ = 12433232856.

The previous prime is 12621615233. The next prime is 12621615271. The reversal of 12621615239 is 93251612621.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12621615239 - 2⁸ = 12621614983 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 (12621615233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94191092 + ... + 94191225.

It is an arithmetic number, because the mean of its divisors is an integer number (3202499406).

Almost surely, 2^12621615239 is an apocalyptic number.

12621615239 is a deficient number, since it is larger than the sum of its proper divisors (188382385).

12621615239 is an equidigital number, since it uses as much as digits as its factorization.

12621615239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188382384.

The product of its digits is 38880, while the sum is 38.

The spelling of 12621615239 in words is "twelve billion, six hundred twenty-one million, six hundred fifteen thousand, two hundred thirty-nine".