25516648 has 8 divisors (see below), whose sum is σ = 47843730. Its totient is φ = 12758320.

The previous prime is 25516633. The next prime is 25516651. The reversal of 25516648 is 84661552.

It can be written as a sum of positive squares in only one way, i.e., 24780484 + 736164 = 4978^2 + 858^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

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 as a sum of consecutive naturals, namely, 1594783 + ... + 1594798.

Almost surely, 2^25516648 is an apocalyptic number.

It is an amenable number.

25516648 is a deficient number, since it is larger than the sum of its proper divisors (22327082).

25516648 is a wasteful number, since it uses less digits than its factorization.

25516648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3189587 (or 3189583 counting only the distinct ones).

The product of its digits is 57600, while the sum is 37.

The square root of 25516648 is about 5051.4005978540. The cubic root of 25516648 is about 294.4023060724.

The spelling of 25516648 in words is "twenty-five million, five hundred sixteen thousand, six hundred forty-eight".