25645930231 has 2 divisors, whose sum is σ = 25645930232. Its totient is φ = 25645930230.

The previous prime is 25645930229. The next prime is 25645930253. The reversal of 25645930231 is 13203954652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25645930231 - 2¹ = 25645930229 is a prime.

It is a super-2 number, since 2×25645930231² (a number of 22 digits) contains 22 as substring.

Together with 25645930229, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25645930631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12822965115 + 12822965116.

It is an arithmetic number, because the mean of its divisors is an integer number (12822965116).

Almost surely, 2^25645930231 is an apocalyptic number.

25645930231 is a deficient number, since it is larger than the sum of its proper divisors (1).

25645930231 is an equidigital number, since it uses as much as digits as its factorization.

25645930231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 194400, while the sum is 40.

The spelling of 25645930231 in words is "twenty-five billion, six hundred forty-five million, nine hundred thirty thousand, two hundred thirty-one".