25609648 has 10 divisors (see below), whose sum is σ = 49618724. Its totient is φ = 12804816.

The previous prime is 25609643. The next prime is 25609651. The reversal of 25609648 is 84690652.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 25609648.

It is not an unprimeable number, because it can be changed into a prime (25609643) 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 as a sum of consecutive naturals, namely, 800286 + ... + 800317.

Almost surely, 2^25609648 is an apocalyptic number.

It is an amenable number.

25609648 is a deficient number, since it is larger than the sum of its proper divisors (24009076).

25609648 is a wasteful number, since it uses less digits than its factorization.

25609648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1600611 (or 1600605 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 25609648 is about 5060.5975931702. The cubic root of 25609648 is about 294.7595397576.

The spelling of 25609648 in words is "twenty-five million, six hundred nine thousand, six hundred forty-eight".