25548265205 has 4 divisors (see below), whose sum is σ = 30657918252. Its totient is φ = 20438612160.

The previous prime is 25548265201. The next prime is 25548265207. The reversal of 25548265205 is 50256284552.

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 9154279684 + 16393985521 = 95678^2 + 128039^2 .

It is not a de Polignac number, because 25548265205 - 2² = 25548265201 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25548265201) 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, 2554826516 + ... + 2554826525.

It is an arithmetic number, because the mean of its divisors is an integer number (7664479563).

Almost surely, 2^25548265205 is an apocalyptic number.

It is an amenable number.

25548265205 is a deficient number, since it is larger than the sum of its proper divisors (5109653047).

25548265205 is an equidigital number, since it uses as much as digits as its factorization.

25548265205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5109653046.

The product of its (nonzero) digits is 960000, while the sum is 44.

The spelling of 25548265205 in words is "twenty-five billion, five hundred forty-eight million, two hundred sixty-five thousand, two hundred five".