12608794639 has 4 divisors (see below), whose sum is σ = 14410051024. Its totient is φ = 10807538256.

The previous prime is 12608794619. The next prime is 12608794661. The reversal of 12608794639 is 93649780621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93649780621 = 1193 ⋅78499397.

It is a cyclic number.

It is not a de Polignac number, because 12608794639 - 2⁵ = 12608794607 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12608794639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12608794619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 900628182 + ... + 900628195.

It is an arithmetic number, because the mean of its divisors is an integer number (3602512756).

Almost surely, 2^12608794639 is an apocalyptic number.

12608794639 is a deficient number, since it is larger than the sum of its proper divisors (1801256385).

12608794639 is an equidigital number, since it uses as much as digits as its factorization.

12608794639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1801256384.

The product of its (nonzero) digits is 3919104, while the sum is 55.

The spelling of 12608794639 in words is "twelve billion, six hundred eight million, seven hundred ninety-four thousand, six hundred thirty-nine".