25925897693 has 4 divisors (see below), whose sum is σ = 26415065628. Its totient is φ = 25436729760.

The previous prime is 25925897677. The next prime is 25925897749. The reversal of 25925897693 is 39679852952.

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 23581594969 + 2344302724 = 153563^2 + 48418^2 .

It is a cyclic number.

It is not a de Polignac number, because 25925897693 - 2⁴ = 25925897677 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 (25925897623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 244583888 + ... + 244583993.

It is an arithmetic number, because the mean of its divisors is an integer number (6603766407).

Almost surely, 2^25925897693 is an apocalyptic number.

It is an amenable number.

25925897693 is a deficient number, since it is larger than the sum of its proper divisors (489167935).

25925897693 is an equidigital number, since it uses as much as digits as its factorization.

25925897693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489167934.

The product of its digits is 73483200, while the sum is 65.

The spelling of 25925897693 in words is "twenty-five billion, nine hundred twenty-five million, eight hundred ninety-seven thousand, six hundred ninety-three".