12561468511 has 2 divisors, whose sum is σ = 12561468512. Its totient is φ = 12561468510.

The previous prime is 12561468481. The next prime is 12561468539. The reversal of 12561468511 is 11586416521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12561468511 - 2²⁵ = 12527914079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12561468551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6280734255 + 6280734256.

It is an arithmetic number, because the mean of its divisors is an integer number (6280734256).

Almost surely, 2^12561468511 is an apocalyptic number.

12561468511 is a deficient number, since it is larger than the sum of its proper divisors (1).

12561468511 is an equidigital number, since it uses as much as digits as its factorization.

12561468511 is an evil number, because the sum of its binary digits is even.

The product of its digits is 57600, while the sum is 40.

The spelling of 12561468511 in words is "twelve billion, five hundred sixty-one million, four hundred sixty-eight thousand, five hundred eleven".