12669495161 has 2 divisors, whose sum is σ = 12669495162. Its totient is φ = 12669495160.

The previous prime is 12669495149. The next prime is 12669495197. The reversal of 12669495161 is 16159496621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7174090000 + 5495405161 = 84700^2 + 74131^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12669495161 is a prime.

It is a super-2 number, since 2×12669495161² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12669495131) 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, 6334747580 + 6334747581.

It is an arithmetic number, because the mean of its divisors is an integer number (6334747581).

Almost surely, 2^12669495161 is an apocalyptic number.

It is an amenable number.

12669495161 is a deficient number, since it is larger than the sum of its proper divisors (1).

12669495161 is an equidigital number, since it uses as much as digits as its factorization.

12669495161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 699840, while the sum is 50.

The spelling of 12669495161 in words is "twelve billion, six hundred sixty-nine million, four hundred ninety-five thousand, one hundred sixty-one".