12779460913 has 4 divisors (see below), whose sum is σ = 12817382500. Its totient is φ = 12741539328.

The previous prime is 12779460907. The next prime is 12779460917. The reversal of 12779460913 is 31906497721.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8718330384 + 4061130529 = 93372^2 + 63727^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12779460913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12779460917) 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, 18960288 + ... + 18960961.

It is an arithmetic number, because the mean of its divisors is an integer number (3204345625).

Almost surely, 2^12779460913 is an apocalyptic number.

It is an amenable number.

12779460913 is a deficient number, since it is larger than the sum of its proper divisors (37921587).

12779460913 is an equidigital number, since it uses as much as digits as its factorization.

12779460913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37921586.

The product of its (nonzero) digits is 571536, while the sum is 49.

The spelling of 12779460913 in words is "twelve billion, seven hundred seventy-nine million, four hundred sixty thousand, nine hundred thirteen".