12539385601 has 2 divisors, whose sum is σ = 12539385602. Its totient is φ = 12539385600.

The previous prime is 12539385583. The next prime is 12539385629. The reversal of 12539385601 is 10658393521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10175967376 + 2363418225 = 100876^2 + 48615^2 .

It is an emirp because it is prime and its reverse (10658393521) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12539385601 is a prime.

It is a super-2 number, since 2×12539385601² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12539385671) 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, 6269692800 + 6269692801.

It is an arithmetic number, because the mean of its divisors is an integer number (6269692801).

Almost surely, 2^12539385601 is an apocalyptic number.

It is an amenable number.

12539385601 is a deficient number, since it is larger than the sum of its proper divisors (1).

12539385601 is an equidigital number, since it uses as much as digits as its factorization.

12539385601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 194400, while the sum is 43.

The spelling of 12539385601 in words is "twelve billion, five hundred thirty-nine million, three hundred eighty-five thousand, six hundred one".