12642264917 has 2 divisors, whose sum is σ = 12642264918. Its totient is φ = 12642264916.

The previous prime is 12642264881. The next prime is 12642264949. The reversal of 12642264917 is 71946224621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7223980036 + 5418284881 = 84994^2 + 73609^2 .

It is a cyclic number.

It is not a de Polignac number, because 12642264917 - 2¹² = 12642260821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12642264977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6321132458 + 6321132459.

It is an arithmetic number, because the mean of its divisors is an integer number (6321132459).

Almost surely, 2^12642264917 is an apocalyptic number.

It is an amenable number.

12642264917 is a deficient number, since it is larger than the sum of its proper divisors (1).

12642264917 is an equidigital number, since it uses as much as digits as its factorization.

12642264917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 290304, while the sum is 44.

The spelling of 12642264917 in words is "twelve billion, six hundred forty-two million, two hundred sixty-four thousand, nine hundred seventeen".