12446679257 has 4 divisors (see below), whose sum is σ = 12574995636. Its totient is φ = 12318362880.

The previous prime is 12446679247. The next prime is 12446679283. The reversal of 12446679257 is 75297664421.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6835320976 + 5611358281 = 82676^2 + 74909^2 .

It is a cyclic number.

It is not a de Polignac number, because 12446679257 - 2¹² = 12446675161 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12446679199 and 12446679208.

It is not an unprimeable number, because it can be changed into a prime (12446679247) 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, 64158044 + ... + 64158237.

It is an arithmetic number, because the mean of its divisors is an integer number (3143748909).

Almost surely, 2^12446679257 is an apocalyptic number.

It is an amenable number.

12446679257 is a deficient number, since it is larger than the sum of its proper divisors (128316379).

12446679257 is an equidigital number, since it uses as much as digits as its factorization.

12446679257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128316378.

The product of its digits is 5080320, while the sum is 53.

The spelling of 12446679257 in words is "twelve billion, four hundred forty-six million, six hundred seventy-nine thousand, two hundred fifty-seven".