25763840009 has 2 divisors, whose sum is σ = 25763840010. Its totient is φ = 25763840008.

The previous prime is 25763839999. The next prime is 25763840041. The reversal of 25763840009 is 90004836752.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19486764025 + 6277075984 = 139595^2 + 79228^2 .

It is a cyclic number.

It is not a de Polignac number, because 25763840009 - 2⁸ = 25763839753 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (25763840059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12881920004 + 12881920005.

It is an arithmetic number, because the mean of its divisors is an integer number (12881920005).

Almost surely, 2^25763840009 is an apocalyptic number.

It is an amenable number.

25763840009 is a deficient number, since it is larger than the sum of its proper divisors (1).

25763840009 is an equidigital number, since it uses as much as digits as its factorization.

25763840009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 362880, while the sum is 44.

The spelling of 25763840009 in words is "twenty-five billion, seven hundred sixty-three million, eight hundred forty thousand, nine".