25805528260 has 24 divisors (see below), whose sum is σ = 54274625496. Its totient is φ = 10306398720.

The previous prime is 25805528249. The next prime is 25805528261. The reversal of 25805528260 is 6282550852.

It can be written as a sum of positive squares in 4 ways, for example, as 373571584 + 25431956676 = 19328^2 + 159474^2 .

It is not an unprimeable number, because it can be changed into a prime (25805528261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 974901 + ... + 1001020.

It is an arithmetic number, because the mean of its divisors is an integer number (2261442729).

Almost surely, 2^25805528260 is an apocalyptic number.

25805528260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25805528260 is an abundant number, since it is smaller than the sum of its proper divisors (28469097236).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25805528260 is a wasteful number, since it uses less digits than its factorization.

25805528260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1976583 (or 1976581 counting only the distinct ones).

The product of its (nonzero) digits is 384000, while the sum is 43.

The spelling of 25805528260 in words is "twenty-five billion, eight hundred five million, five hundred twenty-eight thousand, two hundred sixty".