25648656 has 80 divisors (see below), whose sum is σ = 74661888. Its totient is φ = 7516800.

The previous prime is 25648639. The next prime is 25648663. The reversal of 25648656 is 65684652.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 15585 + ... + 17151.

Almost surely, 2^25648656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25648656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37330944).

25648656 is an abundant number, since it is smaller than the sum of its proper divisors (49013232).

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

25648656 is a wasteful number, since it uses less digits than its factorization.

25648656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1620 (or 1614 counting only the distinct ones).

The product of its digits is 345600, while the sum is 42.

The square root of 25648656 is about 5064.4502169535. The cubic root of 25648656 is about 294.9091207182.

The spelling of 25648656 in words is "twenty-five million, six hundred forty-eight thousand, six hundred fifty-six".