25680144 has 80 divisors (see below), whose sum is σ = 79137792. Its totient is φ = 7016064.

The previous prime is 25680139. The next prime is 25680169. The reversal of 25680144 is 44108652.

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 15 ways as a sum of consecutive naturals, for example, 6067 + ... + 9389.

Almost surely, 2^25680144 is an apocalyptic number.

25680144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25680144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39568896).

25680144 is an abundant number, since it is smaller than the sum of its proper divisors (53457648).

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

25680144 is a wasteful number, since it uses less digits than its factorization.

25680144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3364 (or 3358 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 25680144 is about 5067.5579917747. The cubic root of 25680144 is about 295.0297547312.

Adding to 25680144 its reverse (44108652), we get a palindrome (69788796).

The spelling of 25680144 in words is "twenty-five million, six hundred eighty thousand, one hundred forty-four".