25545664 has 14 divisors (see below), whose sum is σ = 50692304. Its totient is φ = 12772800.

The previous prime is 25545661. The next prime is 25545683. The reversal of 25545664 is 46654552.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25545661) 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, 199512 + ... + 199639.

Almost surely, 2^25545664 is an apocalyptic number.

It is an amenable number.

25545664 is a deficient number, since it is larger than the sum of its proper divisors (25146640).

25545664 is an equidigital number, since it uses as much as digits as its factorization.

25545664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399163 (or 399153 counting only the distinct ones).

The product of its digits is 144000, while the sum is 37.

The square root of 25545664 is about 5054.2718565586. The cubic root of 25545664 is about 294.5138560090.

The spelling of 25545664 in words is "twenty-five million, five hundred forty-five thousand, six hundred sixty-four".