25448648761 has 2 divisors, whose sum is σ = 25448648762. Its totient is φ = 25448648760.

The previous prime is 25448648713. The next prime is 25448648767. The reversal of 25448648761 is 16784684452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25167918736 + 280730025 = 158644^2 + 16755^2 .

It is a cyclic number.

It is not a de Polignac number, because 25448648761 - 2²⁷ = 25314431033 is a prime.

It is not a weakly prime, because it can be changed into another prime (25448648767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12724324380 + 12724324381.

It is an arithmetic number, because the mean of its divisors is an integer number (12724324381).

Almost surely, 2^25448648761 is an apocalyptic number.

It is an amenable number.

25448648761 is a deficient number, since it is larger than the sum of its proper divisors (1).

25448648761 is an equidigital number, since it uses as much as digits as its factorization.

25448648761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10321920, while the sum is 55.

The spelling of 25448648761 in words is "twenty-five billion, four hundred forty-eight million, six hundred forty-eight thousand, seven hundred sixty-one".