25816625 has 16 divisors (see below), whose sum is σ = 34117200. Its totient is φ = 19436800.

The previous prime is 25816613. The next prime is 25816627. The reversal of 25816625 is 52661852.

It can be written as a sum of positive squares in 8 ways, for example, as 425104 + 25391521 = 652^2 + 5039^2 .

It is not a de Polignac number, because 25816625 - 2⁸ = 25816369 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25816627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3950 + ... + 8199.

It is an arithmetic number, because the mean of its divisors is an integer number (2132325).

Almost surely, 2^25816625 is an apocalyptic number.

25816625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25816625 is a deficient number, since it is larger than the sum of its proper divisors (8300575).

25816625 is a wasteful number, since it uses less digits than its factorization.

25816625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12181 (or 12171 counting only the distinct ones).

The product of its digits is 28800, while the sum is 35.

The square root of 25816625 is about 5081.0062979689. The cubic root of 25816625 is about 295.5514915857.

The spelling of 25816625 in words is "twenty-five million, eight hundred sixteen thousand, six hundred twenty-five".