25208585417 has 4 divisors (see below), whose sum is σ = 25306673556. Its totient is φ = 25110497280.

The previous prime is 25208585393. The next prime is 25208585453. The reversal of 25208585417 is 71458580252.

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 16413709456 + 8794875961 = 128116^2 + 93781^2 .

It is a cyclic number.

It is not a de Polignac number, because 25208585417 - 2⁸ = 25208585161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25208584417) 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, 49043684 + ... + 49044197.

It is an arithmetic number, because the mean of its divisors is an integer number (6326668389).

Almost surely, 2^25208585417 is an apocalyptic number.

It is an amenable number.

25208585417 is a deficient number, since it is larger than the sum of its proper divisors (98088139).

25208585417 is an equidigital number, since it uses as much as digits as its factorization.

25208585417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98088138.

The product of its (nonzero) digits is 896000, while the sum is 47.

The spelling of 25208585417 in words is "twenty-five billion, two hundred eight million, five hundred eighty-five thousand, four hundred seventeen".