12656276449 has 4 divisors (see below), whose sum is σ = 12816482560. Its totient is φ = 12496070340.

The previous prime is 12656276441. The next prime is 12656276459. The reversal of 12656276449 is 94467265621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 94467265621 = 379 ⋅249253999.

It is a cyclic number.

It is not a de Polignac number, because 12656276449 - 2³ = 12656276441 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12656276396 and 12656276405.

It is not an unprimeable number, because it can be changed into a prime (12656276441) 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, 80102937 + ... + 80103094.

It is an arithmetic number, because the mean of its divisors is an integer number (3204120640).

Almost surely, 2^12656276449 is an apocalyptic number.

It is an amenable number.

12656276449 is a deficient number, since it is larger than the sum of its proper divisors (160206111).

12656276449 is an equidigital number, since it uses as much as digits as its factorization.

12656276449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160206110.

The product of its digits is 4354560, while the sum is 52.

The spelling of 12656276449 in words is "twelve billion, six hundred fifty-six million, two hundred seventy-six thousand, four hundred forty-nine".