25663120 has 40 divisors (see below), whose sum is σ = 68192064. Its totient is φ = 8798592.

The previous prime is 25663117. The next prime is 25663151. The reversal of 25663120 is 2136652.

It is a tau number, because it is divible by the number of its divisors (40).

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 7 ways as a sum of consecutive naturals, for example, 22354 + ... + 23473.

Almost surely, 2^25663120 is an apocalyptic number.

25663120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25663120 is an abundant number, since it is smaller than the sum of its proper divisors (42528944).

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

25663120 is a wasteful number, since it uses less digits than its factorization.

25663120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45847 (or 45841 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 25663120 is about 5065.8780087957. The cubic root of 25663120 is about 294.9645461558.

Adding to 25663120 its reverse (2136652), we get a palindrome (27799772).

The spelling of 25663120 in words is "twenty-five million, six hundred sixty-three thousand, one hundred twenty".