12611664613 has 2 divisors, whose sum is σ = 12611664614. Its totient is φ = 12611664612.

The previous prime is 12611664581. The next prime is 12611664631. The reversal of 12611664613 is 31646611621.

Together with next prime (12611664631) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12584801124 + 26863489 = 112182^2 + 5183^2 .

It is a cyclic number.

It is not a de Polignac number, because 12611664613 - 2⁵ = 12611664581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12611664643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6305832306 + 6305832307.

It is an arithmetic number, because the mean of its divisors is an integer number (6305832307).

Almost surely, 2^12611664613 is an apocalyptic number.

It is an amenable number.

12611664613 is a deficient number, since it is larger than the sum of its proper divisors (1).

12611664613 is an equidigital number, since it uses as much as digits as its factorization.

12611664613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 37.

The spelling of 12611664613 in words is "twelve billion, six hundred eleven million, six hundred sixty-four thousand, six hundred thirteen".