12799657409 has 16 divisors (see below), whose sum is σ = 16065129600. Its totient is φ = 9906812160.

The previous prime is 12799657379. The next prime is 12799657433. The reversal of 12799657409 is 90475699721.

It is not a de Polignac number, because 12799657409 - 2²⁰ = 12798608833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12799657489) 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 15 ways as a sum of consecutive naturals, for example, 546344 + ... + 569289.

It is an arithmetic number, because the mean of its divisors is an integer number (1004070600).

Almost surely, 2^12799657409 is an apocalyptic number.

It is an amenable number.

12799657409 is a deficient number, since it is larger than the sum of its proper divisors (3265472191).

12799657409 is a wasteful number, since it uses less digits than its factorization.

12799657409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1115800.

The product of its (nonzero) digits is 8573040, while the sum is 59.

The spelling of 12799657409 in words is "twelve billion, seven hundred ninety-nine million, six hundred fifty-seven thousand, four hundred nine".