12439525757 has 2 divisors, whose sum is σ = 12439525758. Its totient is φ = 12439525756.

The previous prime is 12439525691. The next prime is 12439525783. The reversal of 12439525757 is 75752593421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9807733156 + 2631792601 = 99034^2 + 51301^2 .

It is a cyclic number.

It is not a de Polignac number, because 12439525757 - 2¹⁶ = 12439460221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12439525057) 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, 6219762878 + 6219762879.

It is an arithmetic number, because the mean of its divisors is an integer number (6219762879).

Almost surely, 2^12439525757 is an apocalyptic number.

It is an amenable number.

12439525757 is a deficient number, since it is larger than the sum of its proper divisors (1).

12439525757 is an equidigital number, since it uses as much as digits as its factorization.

12439525757 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2646000, while the sum is 50.

The spelling of 12439525757 in words is "twelve billion, four hundred thirty-nine million, five hundred twenty-five thousand, seven hundred fifty-seven".