25680216 has 16 divisors (see below), whose sum is σ = 64200600. Its totient is φ = 8560064.

The previous prime is 25680209. The next prime is 25680223. The reversal of 25680216 is 61208652.

It is an interprime number because it is at equal distance from previous prime (25680209) and next prime (25680223).

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 534981 + ... + 535028.

Almost surely, 2^25680216 is an apocalyptic number.

It is an amenable number.

25680216 is an abundant number, since it is smaller than the sum of its proper divisors (38520384).

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

25680216 is a wasteful number, since it uses less digits than its factorization.

25680216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1070018 (or 1070014 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 25680216 is about 5067.5650957832. The cubic root of 25680216 is about 295.0300304581.

Adding to 25680216 its reverse (61208652), we get a palindrome (86888868).

The spelling of 25680216 in words is "twenty-five million, six hundred eighty thousand, two hundred sixteen".