25899406317 has 24 divisors (see below), whose sum is σ = 39742073280. Its totient is φ = 16845135840.

The previous prime is 25899406303. The next prime is 25899406321. The reversal of 25899406317 is 71360499852.

25899406317 is a `hidden beast` number, since 2 + 589 + 9 + 40 + 6 + 3 + 17 = 666.

It is not a de Polignac number, because 25899406317 - 2⁷ = 25899406189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25899406387) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1289817 + ... + 1309742.

It is an arithmetic number, because the mean of its divisors is an integer number (1655919720).

It is a 1-persistent number, because it is pandigital, but 2⋅25899406317 = 51798812634 is not.

Almost surely, 2^25899406317 is an apocalyptic number.

25899406317 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

25899406317 is a deficient number, since it is larger than the sum of its proper divisors (13842666963).

25899406317 is an equidigital number, since it uses as much as digits as its factorization.

25899406317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2599615 (or 2599603 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 54.

The spelling of 25899406317 in words is "twenty-five billion, eight hundred ninety-nine million, four hundred six thousand, three hundred seventeen".