12556795734479 has 4 divisors (see below), whose sum is σ = 12848814239976. Its totient is φ = 12264777228984.

The previous prime is 12556795734377. The next prime is 12556795734491. The reversal of 12556795734479 is 97443759765521.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12556795734479 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 (12556795734079) 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, 146009252684 + ... + 146009252769.

It is an arithmetic number, because the mean of its divisors is an integer number (3212203559994).

Almost surely, 2^{12556795734479} is an apocalyptic number.

12556795734479 is a deficient number, since it is larger than the sum of its proper divisors (292018505497).

12556795734479 is an equidigital number, since it uses as much as digits as its factorization.

12556795734479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292018505496.

The product of its digits is 2000376000, while the sum is 74.

The spelling of 12556795734479 in words is "twelve trillion, five hundred fifty-six billion, seven hundred ninety-five million, seven hundred thirty-four thousand, four hundred seventy-nine".