12915961279 has 4 divisors (see below), whose sum is σ = 13909496776. Its totient is φ = 11922425784.

The previous prime is 12915961277. The next prime is 12915961301. The reversal of 12915961279 is 97216951921.

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 12915961279 - 2¹ = 12915961277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12915961271) 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, 496767729 + ... + 496767754.

It is an arithmetic number, because the mean of its divisors is an integer number (3477374194).

Almost surely, 2^12915961279 is an apocalyptic number.

12915961279 is a deficient number, since it is larger than the sum of its proper divisors (993535497).

12915961279 is an equidigital number, since it uses as much as digits as its factorization.

12915961279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 993535496.

The product of its digits is 612360, while the sum is 52.

The spelling of 12915961279 in words is "twelve billion, nine hundred fifteen million, nine hundred sixty-one thousand, two hundred seventy-nine".