25655816 has 16 divisors (see below), whose sum is σ = 49013100. Its totient is φ = 12585664.

The previous prime is 25655813. The next prime is 25655831. The reversal of 25655816 is 61855652.

It can be written as a sum of positive squares in 2 ways, for example, as 21436900 + 4218916 = 4630^2 + 2054^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 25655816.

It is not an unprimeable number, because it can be changed into a prime (25655813) 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, 29831 + ... + 30678.

Almost surely, 2^25655816 is an apocalyptic number.

It is an amenable number.

25655816 is a deficient number, since it is larger than the sum of its proper divisors (23357284).

25655816 is a wasteful number, since it uses less digits than its factorization.

25655816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60568 (or 60564 counting only the distinct ones).

The product of its digits is 72000, while the sum is 38.

The square root of 25655816 is about 5065.1570558078. The cubic root of 25655816 is about 294.9365601397.

The spelling of 25655816 in words is "twenty-five million, six hundred fifty-five thousand, eight hundred sixteen".