25951290257 has 4 divisors (see below), whose sum is σ = 25969176816. Its totient is φ = 25933403700.

The previous prime is 25951290247. The next prime is 25951290269. The reversal of 25951290257 is 75209215952.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25951290257 - 2¹⁰ = 25951289233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25951290247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8941103 + ... + 8944004.

It is an arithmetic number, because the mean of its divisors is an integer number (6492294204).

Almost surely, 2^25951290257 is an apocalyptic number.

It is an amenable number.

25951290257 is a deficient number, since it is larger than the sum of its proper divisors (17886559).

25951290257 is a wasteful number, since it uses less digits than its factorization.

25951290257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17886558.

The product of its (nonzero) digits is 567000, while the sum is 47.

The spelling of 25951290257 in words is "twenty-five billion, nine hundred fifty-one million, two hundred ninety thousand, two hundred fifty-seven".