25172603256317 has 16 divisors (see below), whose sum is σ = 27602147865600. Its totient is φ = 22766594235840.

The previous prime is 25172603256301. The next prime is 25172603256329. The reversal of 25172603256317 is 71365230627152.

It is a cyclic number.

It is not a de Polignac number, because 25172603256317 - 2⁴ = 25172603256301 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25172603256337) 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, 35007359 + ... + 35719187.

It is an arithmetic number, because the mean of its divisors is an integer number (1725134241600).

Almost surely, 2^{25172603256317} is an apocalyptic number.

It is an amenable number.

25172603256317 is a deficient number, since it is larger than the sum of its proper divisors (2429544609283).

25172603256317 is a wasteful number, since it uses less digits than its factorization.

25172603256317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 728356.

The product of its (nonzero) digits is 3175200, while the sum is 50.

The spelling of 25172603256317 in words is "twenty-five trillion, one hundred seventy-two billion, six hundred three million, two hundred fifty-six thousand, three hundred seventeen".