12539385671 has 2 divisors, whose sum is σ = 12539385672. Its totient is φ = 12539385670.

The previous prime is 12539385653. The next prime is 12539385697. The reversal of 12539385671 is 17658393521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12539385671 - 2²² = 12535191367 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12539385601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6269692835 + 6269692836.

It is an arithmetic number, because the mean of its divisors is an integer number (6269692836).

Almost surely, 2^12539385671 is an apocalyptic number.

12539385671 is a deficient number, since it is larger than the sum of its proper divisors (1).

12539385671 is an equidigital number, since it uses as much as digits as its factorization.

12539385671 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1360800, while the sum is 50.

The spelling of 12539385671 in words is "twelve billion, five hundred thirty-nine million, three hundred eighty-five thousand, six hundred seventy-one".