12689906641 has 2 divisors, whose sum is σ = 12689906642. Its totient is φ = 12689906640.

The previous prime is 12689906573. The next prime is 12689906657. The reversal of 12689906641 is 14660998621.

It is a happy number.

12689906641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9272919616 + 3416987025 = 96296^2 + 58455^2 .

It is an emirp because it is prime and its reverse (14660998621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12689906641 - 2¹⁹ = 12689382353 is a prime.

It is a super-2 number, since 2×12689906641² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12689106641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6344953320 + 6344953321.

It is an arithmetic number, because the mean of its divisors is an integer number (6344953321).

Almost surely, 2^12689906641 is an apocalyptic number.

It is an amenable number.

12689906641 is a deficient number, since it is larger than the sum of its proper divisors (1).

12689906641 is an equidigital number, since it uses as much as digits as its factorization.

12689906641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1119744, while the sum is 52.

The spelling of 12689906641 in words is "twelve billion, six hundred eighty-nine million, nine hundred six thousand, six hundred forty-one".