25663898231 has 2 divisors, whose sum is σ = 25663898232. Its totient is φ = 25663898230.

The previous prime is 25663898213. The next prime is 25663898237. The reversal of 25663898231 is 13289836652.

Together with previous prime (25663898213) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25663898231 is a prime.

It is a super-2 number, since 2×25663898231² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25663898237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12831949115 + 12831949116.

It is an arithmetic number, because the mean of its divisors is an integer number (12831949116).

Almost surely, 2^25663898231 is an apocalyptic number.

25663898231 is a deficient number, since it is larger than the sum of its proper divisors (1).

25663898231 is an equidigital number, since it uses as much as digits as its factorization.

25663898231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3732480, while the sum is 53.

The spelling of 25663898231 in words is "twenty-five billion, six hundred sixty-three million, eight hundred ninety-eight thousand, two hundred thirty-one".