25648831517 has 8 divisors (see below), whose sum is σ = 25859766240. Its totient is φ = 25438126480.

The previous prime is 25648831513. The next prime is 25648831577. The reversal of 25648831517 is 71513884652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25648831517 - 2² = 25648831513 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 (25648831513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 170534 + ... + 283512.

It is an arithmetic number, because the mean of its divisors is an integer number (3232470780).

Almost surely, 2^25648831517 is an apocalyptic number.

It is an amenable number.

25648831517 is a deficient number, since it is larger than the sum of its proper divisors (210934723).

25648831517 is a wasteful number, since it uses less digits than its factorization.

25648831517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114843.

The product of its digits is 1612800, while the sum is 50.

The spelling of 25648831517 in words is "twenty-five billion, six hundred forty-eight million, eight hundred thirty-one thousand, five hundred seventeen".