12506388757 has 2 divisors, whose sum is σ = 12506388758. Its totient is φ = 12506388756.

The previous prime is 12506388749. The next prime is 12506388761. The reversal of 12506388757 is 75788360521.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10281757201 + 2224631556 = 101399^2 + 47166^2 .

It is a cyclic number.

It is not a de Polignac number, because 12506388757 - 2³ = 12506388749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12506388737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6253194378 + 6253194379.

It is an arithmetic number, because the mean of its divisors is an integer number (6253194379).

Almost surely, 2^12506388757 is an apocalyptic number.

It is an amenable number.

12506388757 is a deficient number, since it is larger than the sum of its proper divisors (1).

12506388757 is an equidigital number, since it uses as much as digits as its factorization.

12506388757 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2822400, while the sum is 52.

The spelling of 12506388757 in words is "twelve billion, five hundred six million, three hundred eighty-eight thousand, seven hundred fifty-seven".