25506648 has 24 divisors (see below), whose sum is σ = 69080700. Its totient is φ = 8502192.

The previous prime is 25506643. The next prime is 25506659. The reversal of 25506648 is 84660552.

25506648 is a `hidden beast` number, since 2 + 5 + 5 + 0 + 6 + 648 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25506643) 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 5 ways as a sum of consecutive naturals, for example, 177058 + ... + 177201.

Almost surely, 2^25506648 is an apocalyptic number.

It is an amenable number.

25506648 is an abundant number, since it is smaller than the sum of its proper divisors (43574052).

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

25506648 is a wasteful number, since it uses less digits than its factorization.

25506648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354271 (or 354264 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The square root of 25506648 is about 5050.4106763708. The cubic root of 25506648 is about 294.3638421941.

The spelling of 25506648 in words is "twenty-five million, five hundred six thousand, six hundred forty-eight".