12956813579 has 2 divisors, whose sum is σ = 12956813580. Its totient is φ = 12956813578.

The previous prime is 12956813567. The next prime is 12956813603. The reversal of 12956813579 is 97531865921.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12956813579 is a prime.

It is not a weakly prime, because it can be changed into another prime (12956813549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6478406789 + 6478406790.

It is an arithmetic number, because the mean of its divisors is an integer number (6478406790).

Almost surely, 2^12956813579 is an apocalyptic number.

12956813579 is a deficient number, since it is larger than the sum of its proper divisors (1).

12956813579 is an equidigital number, since it uses as much as digits as its factorization.

12956813579 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4082400, while the sum is 56.

The spelling of 12956813579 in words is "twelve billion, nine hundred fifty-six million, eight hundred thirteen thousand, five hundred seventy-nine".