25752577817 has 2 divisors, whose sum is σ = 25752577818. Its totient is φ = 25752577816.

The previous prime is 25752577813. The next prime is 25752577841. The reversal of 25752577817 is 71877525752.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25009524736 + 743053081 = 158144^2 + 27259^2 .

It is a cyclic number.

It is not a de Polignac number, because 25752577817 - 2² = 25752577813 is a prime.

It is not a weakly prime, because it can be changed into another prime (25752577813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12876288908 + 12876288909.

It is an arithmetic number, because the mean of its divisors is an integer number (12876288909).

Almost surely, 2^25752577817 is an apocalyptic number.

It is an amenable number.

25752577817 is a deficient number, since it is larger than the sum of its proper divisors (1).

25752577817 is an equidigital number, since it uses as much as digits as its factorization.

25752577817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9604000, while the sum is 56.

The spelling of 25752577817 in words is "twenty-five billion, seven hundred fifty-two million, five hundred seventy-seven thousand, eight hundred seventeen".