25525171680317 has 4 divisors (see below), whose sum is σ = 25631085255996. Its totient is φ = 25419258104640.

The previous prime is 25525171680313. The next prime is 25525171680353. The reversal of 25525171680317 is 71308617152552.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13644114114436 + 11881057565881 = 3693794^2 + 3446891^2 .

It is a cyclic number.

It is not a de Polignac number, because 25525171680317 - 2² = 25525171680313 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25525171680313) 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, 52956787478 + ... + 52956787959.

It is an arithmetic number, because the mean of its divisors is an integer number (6407771313999).

Almost surely, 2^{25525171680317} is an apocalyptic number.

It is an amenable number.

25525171680317 is a deficient number, since it is larger than the sum of its proper divisors (105913575679).

25525171680317 is a wasteful number, since it uses less digits than its factorization.

25525171680317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105913575678.

The product of its (nonzero) digits is 3528000, while the sum is 53.

The spelling of 25525171680317 in words is "twenty-five trillion, five hundred twenty-five billion, one hundred seventy-one million, six hundred eighty thousand, three hundred seventeen".