12461607551 has 2 divisors, whose sum is σ = 12461607552. Its totient is φ = 12461607550.

The previous prime is 12461607451. The next prime is 12461607619. The reversal of 12461607551 is 15570616421.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12461607551 - 2¹⁰ = 12461606527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12461607451) 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 as a sum of consecutive naturals, namely, 6230803775 + 6230803776.

It is an arithmetic number, because the mean of its divisors is an integer number (6230803776).

Almost surely, 2^12461607551 is an apocalyptic number.

12461607551 is a deficient number, since it is larger than the sum of its proper divisors (1).

12461607551 is an equidigital number, since it uses as much as digits as its factorization.

12461607551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 50400, while the sum is 38.

The spelling of 12461607551 in words is "twelve billion, four hundred sixty-one million, six hundred seven thousand, five hundred fifty-one".