12257555309 has 4 divisors (see below), whose sum is σ = 12680229660. Its totient is φ = 11834880960.

The previous prime is 12257555293. The next prime is 12257555351. The reversal of 12257555309 is 90355575221.

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 6021294409 + 6236260900 = 77597^2 + 78970^2 .

It is a cyclic number.

It is not a de Polignac number, because 12257555309 - 2⁴ = 12257555293 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 12257555309.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12257555389) 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, 211337132 + ... + 211337189.

It is an arithmetic number, because the mean of its divisors is an integer number (3170057415).

Almost surely, 2^12257555309 is an apocalyptic number.

It is an amenable number.

12257555309 is a deficient number, since it is larger than the sum of its proper divisors (422674351).

12257555309 is an equidigital number, since it uses as much as digits as its factorization.

12257555309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422674350.

The product of its (nonzero) digits is 472500, while the sum is 44.

The spelling of 12257555309 in words is "twelve billion, two hundred fifty-seven million, five hundred fifty-five thousand, three hundred nine".