25540452757 has 2 divisors, whose sum is σ = 25540452758. Its totient is φ = 25540452756.

The previous prime is 25540452733. The next prime is 25540452779. The reversal of 25540452757 is 75725404552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22435845796 + 3104606961 = 149786^2 + 55719^2 .

It is a cyclic number.

It is not a de Polignac number, because 25540452757 - 2²³ = 25532064149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25540452857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12770226378 + 12770226379.

It is an arithmetic number, because the mean of its divisors is an integer number (12770226379).

Almost surely, 2^25540452757 is an apocalyptic number.

It is an amenable number.

25540452757 is a deficient number, since it is larger than the sum of its proper divisors (1).

25540452757 is an equidigital number, since it uses as much as digits as its factorization.

25540452757 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1960000, while the sum is 46.

The spelling of 25540452757 in words is "twenty-five billion, five hundred forty million, four hundred fifty-two thousand, seven hundred fifty-seven".