12256955257 has 4 divisors (see below), whose sum is σ = 12588224356. Its totient is φ = 11925686160.

The previous prime is 12256955251. The next prime is 12256955261. The reversal of 12256955257 is 75255965221.

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 11129406016 + 1127549241 = 105496^2 + 33579^2 .

It is a cyclic number.

It is not a de Polignac number, because 12256955257 - 2¹¹ = 12256953209 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12256955257.

It is not an unprimeable number, because it can be changed into a prime (12256955251) 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, 165634494 + ... + 165634567.

It is an arithmetic number, because the mean of its divisors is an integer number (3147056089).

Almost surely, 2^12256955257 is an apocalyptic number.

It is an amenable number.

12256955257 is a deficient number, since it is larger than the sum of its proper divisors (331269099).

12256955257 is an equidigital number, since it uses as much as digits as its factorization.

12256955257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331269098.

The product of its digits is 1890000, while the sum is 49.

The spelling of 12256955257 in words is "twelve billion, two hundred fifty-six million, nine hundred fifty-five thousand, two hundred fifty-seven".