25930261257 has 16 divisors (see below), whose sum is σ = 34983215232. Its totient is φ = 17082616320.

The previous prime is 25930261243. The next prime is 25930261283. The reversal of 25930261257 is 75216203952.

It is not a de Polignac number, because 25930261257 - 2⁴ = 25930261241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25930261297) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124948 + ... + 259754.

It is an arithmetic number, because the mean of its divisors is an integer number (2186450952).

Almost surely, 2^25930261257 is an apocalyptic number.

It is an amenable number.

25930261257 is a deficient number, since it is larger than the sum of its proper divisors (9052953975).

25930261257 is a wasteful number, since it uses less digits than its factorization.

25930261257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135568.

The product of its (nonzero) digits is 226800, while the sum is 42.

The spelling of 25930261257 in words is "twenty-five billion, nine hundred thirty million, two hundred sixty-one thousand, two hundred fifty-seven".