12641216069 has 2 divisors, whose sum is σ = 12641216070. Its totient is φ = 12641216068.

The previous prime is 12641216051. The next prime is 12641216117. The reversal of 12641216069 is 96061214621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7612562500 + 5028653569 = 87250^2 + 70913^2 .

It is a cyclic number.

It is not a de Polignac number, because 12641216069 - 2²⁸ = 12372780613 is a prime.

It is a super-2 number, since 2×12641216069² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12641216969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6320608034 + 6320608035.

It is an arithmetic number, because the mean of its divisors is an integer number (6320608035).

Almost surely, 2^12641216069 is an apocalyptic number.

It is an amenable number.

12641216069 is a deficient number, since it is larger than the sum of its proper divisors (1).

12641216069 is an equidigital number, since it uses as much as digits as its factorization.

12641216069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 38.

The spelling of 12641216069 in words is "twelve billion, six hundred forty-one million, two hundred sixteen thousand, sixty-nine".