25805516 has 24 divisors (see below), whose sum is σ = 50856960. Its totient is φ = 11350800.

The previous prime is 25805513. The next prime is 25805531. The reversal of 25805516 is 61550852.

It is not an unprimeable number, because it can be changed into a prime (25805513) 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, 8096 + ... + 10823.

It is an arithmetic number, because the mean of its divisors is an integer number (2119040).

Almost surely, 2^25805516 is an apocalyptic number.

It is an amenable number.

25805516 is a deficient number, since it is larger than the sum of its proper divisors (25051444).

25805516 is a wasteful number, since it uses less digits than its factorization.

25805516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18965 (or 18963 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 32.

The square root of 25805516 is about 5079.9129913809. The cubic root of 25805516 is about 295.5090931626.

It can be divided in two parts, 25805 and 516, that multiplied together give a triangular number (13315380 = T₅₁₆₀).

The spelling of 25805516 in words is "twenty-five million, eight hundred five thousand, five hundred sixteen".