39924641257 has 2 divisors, whose sum is σ = 39924641258. Its totient is φ = 39924641256.

The previous prime is 39924641203. The next prime is 39924641369. The reversal of 39924641257 is 75214642993.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25375215616 + 14549425641 = 159296^2 + 120621^2 .

It is a cyclic number.

It is not a de Polignac number, because 39924641257 - 2²⁷ = 39790423529 is a prime.

It is not a weakly prime, because it can be changed into another prime (39924621257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19962320628 + 19962320629.

It is an arithmetic number, because the mean of its divisors is an integer number (19962320629).

Almost surely, 2^39924641257 is an apocalyptic number.

It is an amenable number.

39924641257 is a deficient number, since it is larger than the sum of its proper divisors (1).

39924641257 is an equidigital number, since it uses as much as digits as its factorization.

39924641257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3265920, while the sum is 52.

The spelling of 39924641257 in words is "thirty-nine billion, nine hundred twenty-four million, six hundred forty-one thousand, two hundred fifty-seven".