40839525257 has 2 divisors, whose sum is σ = 40839525258. Its totient is φ = 40839525256.

The previous prime is 40839525227. The next prime is 40839525263. The reversal of 40839525257 is 75252593804.

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., 40254804496 + 584720761 = 200636^2 + 24181^2 .

It is a cyclic number.

It is not a de Polignac number, because 40839525257 - 2³⁴ = 23659656073 is a prime.

It is not a weakly prime, because it can be changed into another prime (40839525217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20419762628 + 20419762629.

It is an arithmetic number, because the mean of its divisors is an integer number (20419762629).

Almost surely, 2^40839525257 is an apocalyptic number.

It is an amenable number.

40839525257 is a deficient number, since it is larger than the sum of its proper divisors (1).

40839525257 is an equidigital number, since it uses as much as digits as its factorization.

40839525257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024000, while the sum is 50.

The spelling of 40839525257 in words is "forty billion, eight hundred thirty-nine million, five hundred twenty-five thousand, two hundred fifty-seven".