12469856257 has 4 divisors (see below), whose sum is σ = 12470961600. Its totient is φ = 12468750916.

The previous prime is 12469856227. The next prime is 12469856261. The reversal of 12469856257 is 75265896421.

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: 75265896421 = 73 ⋅1031039677.

It is a cyclic number.

It is not a de Polignac number, because 12469856257 - 2⁷ = 12469856129 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12469856198 and 12469856207.

It is not an unprimeable number, because it can be changed into a prime (12469856227) 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, 535573 + ... + 558370.

It is an arithmetic number, because the mean of its divisors is an integer number (3117740400).

Almost surely, 2^12469856257 is an apocalyptic number.

It is an amenable number.

12469856257 is a deficient number, since it is larger than the sum of its proper divisors (1105343).

12469856257 is a wasteful number, since it uses less digits than its factorization.

12469856257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1105342.

The product of its digits is 7257600, while the sum is 55.

The spelling of 12469856257 in words is "twelve billion, four hundred sixty-nine million, eight hundred fifty-six thousand, two hundred fifty-seven".