25823817251 has 2 divisors, whose sum is σ = 25823817252. Its totient is φ = 25823817250.

The previous prime is 25823817247. The next prime is 25823817389. The reversal of 25823817251 is 15271832852.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25823817251 - 2² = 25823817247 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (25823817211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12911908625 + 12911908626.

It is an arithmetic number, because the mean of its divisors is an integer number (12911908626).

Almost surely, 2^25823817251 is an apocalyptic number.

25823817251 is a deficient number, since it is larger than the sum of its proper divisors (1).

25823817251 is an equidigital number, since it uses as much as digits as its factorization.

25823817251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 268800, while the sum is 44.

The spelling of 25823817251 in words is "twenty-five billion, eight hundred twenty-three million, eight hundred seventeen thousand, two hundred fifty-one".