25943848265 has 4 divisors (see below), whose sum is σ = 31132617924. Its totient is φ = 20755078608.

The previous prime is 25943848247. The next prime is 25943848277. The reversal of 25943848265 is 56284834952.

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 19679600656 + 6264247609 = 140284^2 + 79147^2 .

It is a cyclic number.

It is not a de Polignac number, because 25943848265 - 2⁸ = 25943848009 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25943848265.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2594384822 + ... + 2594384831.

It is an arithmetic number, because the mean of its divisors is an integer number (7783154481).

Almost surely, 2^25943848265 is an apocalyptic number.

It is an amenable number.

25943848265 is a deficient number, since it is larger than the sum of its proper divisors (5188769659).

25943848265 is an equidigital number, since it uses as much as digits as its factorization.

25943848265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5188769658.

The product of its digits is 16588800, while the sum is 56.

It can be divided in two parts, 259438 and 48265, that added together give a palindrome (307703).

The spelling of 25943848265 in words is "twenty-five billion, nine hundred forty-three million, eight hundred forty-eight thousand, two hundred sixty-five".