12642129677 has 2 divisors, whose sum is σ = 12642129678. Its totient is φ = 12642129676.

The previous prime is 12642129649. The next prime is 12642129719. The reversal of 12642129677 is 77692124621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10419101476 + 2223028201 = 102074^2 + 47149^2 .

It is an emirp because it is prime and its reverse (77692124621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12642129677 - 2¹⁸ = 12641867533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12642129637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6321064838 + 6321064839.

It is an arithmetic number, because the mean of its divisors is an integer number (6321064839).

Almost surely, 2^12642129677 is an apocalyptic number.

It is an amenable number.

12642129677 is a deficient number, since it is larger than the sum of its proper divisors (1).

12642129677 is an equidigital number, since it uses as much as digits as its factorization.

12642129677 is an evil number, because the sum of its binary digits is even.

The product of its digits is 508032, while the sum is 47.

The spelling of 12642129677 in words is "twelve billion, six hundred forty-two million, one hundred twenty-nine thousand, six hundred seventy-seven".