12251344614561 has 48 divisors (see below), whose sum is σ = 19809131328896. Its totient is φ = 7521876400896.

The previous prime is 12251344614559. The next prime is 12251344614581. The reversal of 12251344614561 is 16541644315221.

12251344614561 is a `hidden beast` number, since 1 + 2 + 2 + 5 + 1 + 3 + 446 + 145 + 61 = 666.

It is not a de Polignac number, because 12251344614561 - 2¹ = 12251344614559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12251344614581) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3110485 + ... + 5846178.

Almost surely, 2^{12251344614561} is an apocalyptic number.

It is an amenable number.

12251344614561 is a deficient number, since it is larger than the sum of its proper divisors (7557786714335).

12251344614561 is an equidigital number, since it uses as much as digits as its factorization.

12251344614561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8957124 (or 8957112 counting only the distinct ones).

The product of its digits is 691200, while the sum is 45.

Adding to 12251344614561 its reverse (16541644315221), we get a palindrome (28792988929782).

The spelling of 12251344614561 in words is "twelve trillion, two hundred fifty-one billion, three hundred forty-four million, six hundred fourteen thousand, five hundred sixty-one".