12756104639 has 2 divisors, whose sum is σ = 12756104640. Its totient is φ = 12756104638.

The previous prime is 12756104591. The next prime is 12756104677. The reversal of 12756104639 is 93640165721.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12756104639 is a prime.

It is a super-2 number, since 2×12756104639² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12756104639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12756104539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6378052319 + 6378052320.

It is an arithmetic number, because the mean of its divisors is an integer number (6378052320).

Almost surely, 2^12756104639 is an apocalyptic number.

12756104639 is a deficient number, since it is larger than the sum of its proper divisors (1).

12756104639 is an equidigital number, since it uses as much as digits as its factorization.

12756104639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 272160, while the sum is 44.

The spelling of 12756104639 in words is "twelve billion, seven hundred fifty-six million, one hundred four thousand, six hundred thirty-nine".