12461926657 has 2 divisors, whose sum is σ = 12461926658. Its totient is φ = 12461926656.

The previous prime is 12461926627. The next prime is 12461926669. The reversal of 12461926657 is 75662916421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12068340736 + 393585921 = 109856^2 + 19839^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12461926657 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12461926657.

It is not a weakly prime, because it can be changed into another prime (12461926627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6230963328 + 6230963329.

It is an arithmetic number, because the mean of its divisors is an integer number (6230963329).

Almost surely, 2^12461926657 is an apocalyptic number.

It is an amenable number.

12461926657 is a deficient number, since it is larger than the sum of its proper divisors (1).

12461926657 is an equidigital number, since it uses as much as digits as its factorization.

12461926657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1088640, while the sum is 49.

The spelling of 12461926657 in words is "twelve billion, four hundred sixty-one million, nine hundred twenty-six thousand, six hundred fifty-seven".