12856128799 has 2 divisors, whose sum is σ = 12856128800. Its totient is φ = 12856128798.

The previous prime is 12856128667. The next prime is 12856128833. The reversal of 12856128799 is 99782165821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12856128799 - 2²⁹ = 12319257887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12856128199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6428064399 + 6428064400.

It is an arithmetic number, because the mean of its divisors is an integer number (6428064400).

Almost surely, 2^12856128799 is an apocalyptic number.

12856128799 is a deficient number, since it is larger than the sum of its proper divisors (1).

12856128799 is an equidigital number, since it uses as much as digits as its factorization.

12856128799 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4354560, while the sum is 58.

The spelling of 12856128799 in words is "twelve billion, eight hundred fifty-six million, one hundred twenty-eight thousand, seven hundred ninety-nine".