25663516 has 12 divisors (see below), whose sum is σ = 44946720. Its totient is φ = 12821600.

The previous prime is 25663513. The next prime is 25663541. The reversal of 25663516 is 61536652.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25663513) 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 3 ways as a sum of consecutive naturals, for example, 8040 + ... + 10768.

It is an arithmetic number, because the mean of its divisors is an integer number (3745560).

Almost surely, 2^25663516 is an apocalyptic number.

It is an amenable number.

25663516 is a deficient number, since it is larger than the sum of its proper divisors (19283204).

25663516 is a wasteful number, since it uses less digits than its factorization.

25663516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5084 (or 5082 counting only the distinct ones).

The product of its digits is 32400, while the sum is 34.

The square root of 25663516 is about 5065.9170936761. The cubic root of 25663516 is about 294.9660633182.

The spelling of 25663516 in words is "twenty-five million, six hundred sixty-three thousand, five hundred sixteen".