12539682437 has 2 divisors, whose sum is σ = 12539682438. Its totient is φ = 12539682436.

The previous prime is 12539682431. The next prime is 12539682481. The reversal of 12539682437 is 73428693521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6776747041 + 5762935396 = 82321^2 + 75914^2 .

It is a cyclic number.

It is not a de Polignac number, because 12539682437 - 2¹⁴ = 12539666053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12539682431) 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, 6269841218 + 6269841219.

It is an arithmetic number, because the mean of its divisors is an integer number (6269841219).

Almost surely, 2^12539682437 is an apocalyptic number.

It is an amenable number.

12539682437 is a deficient number, since it is larger than the sum of its proper divisors (1).

12539682437 is an equidigital number, since it uses as much as digits as its factorization.

12539682437 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2177280, while the sum is 50.

The spelling of 12539682437 in words is "twelve billion, five hundred thirty-nine million, six hundred eighty-two thousand, four hundred thirty-seven".