25787664 has 60 divisors (see below), whose sum is σ = 82482816. Its totient is φ = 7367616.

The previous prime is 25787653. The next prime is 25787681. The reversal of 25787664 is 46678752.

25787664 is a `hidden beast` number, since 2 + 578 + 76 + 6 + 4 = 666.

It is a super-2 number, since 2×25787664² = 1330007229153792, which contains 22 as substring.

It is a nialpdrome in base 12.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 11784 + ... + 13799.

Almost surely, 2^25787664 is an apocalyptic number.

25787664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

25787664 is an abundant number, since it is smaller than the sum of its proper divisors (56695152).

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

25787664 is a wasteful number, since it uses less digits than its factorization.

25787664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25604 (or 25595 counting only the distinct ones).

The product of its digits is 564480, while the sum is 45.

The square root of 25787664 is about 5078.1555706772. The cubic root of 25787664 is about 295.4409340231.

The spelling of 25787664 in words is "twenty-five million, seven hundred eighty-seven thousand, six hundred sixty-four".