12791961907 has 4 divisors (see below), whose sum is σ = 13465223080. Its totient is φ = 12118700736.

The previous prime is 12791961893. The next prime is 12791961913. The reversal of 12791961907 is 70916919721.

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 12791961907 - 2⁷ = 12791961779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12791961977) 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, 336630558 + ... + 336630595.

It is an arithmetic number, because the mean of its divisors is an integer number (3366305770).

Almost surely, 2^12791961907 is an apocalyptic number.

12791961907 is a deficient number, since it is larger than the sum of its proper divisors (673261173).

12791961907 is an equidigital number, since it uses as much as digits as its factorization.

12791961907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 673261172.

The product of its (nonzero) digits is 428652, while the sum is 52.

The spelling of 12791961907 in words is "twelve billion, seven hundred ninety-one million, nine hundred sixty-one thousand, nine hundred seven".