12257745361 has 4 divisors (see below), whose sum is σ = 12258195300. Its totient is φ = 12257295424.

The previous prime is 12257745347. The next prime is 12257745431. The reversal of 12257745361 is 16354775221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16354775221 = 32611 ⋅501511.

It can be written as a sum of positive squares in 2 ways, for example, as 1025984961 + 11231760400 = 32031^2 + 105980^2 .

It is a cyclic number.

It is not a de Polignac number, because 12257745361 - 2¹³ = 12257737169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12257745301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 181276 + ... + 239533.

It is an arithmetic number, because the mean of its divisors is an integer number (3064548825).

Almost surely, 2^12257745361 is an apocalyptic number.

It is an amenable number.

12257745361 is a deficient number, since it is larger than the sum of its proper divisors (449939).

12257745361 is an equidigital number, since it uses as much as digits as its factorization.

12257745361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449938.

The product of its digits is 352800, while the sum is 43.

The spelling of 12257745361 in words is "twelve billion, two hundred fifty-seven million, seven hundred forty-five thousand, three hundred sixty-one".