25643116 has 12 divisors (see below), whose sum is σ = 44927680. Its totient is φ = 12806640.

The previous prime is 25643113. The next prime is 25643131. The reversal of 25643116 is 61134652.

It is not an unprimeable number, because it can be changed into a prime (25643113) 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 in 3 ways as a sum of consecutive naturals, for example, 730 + ... + 7198.

Almost surely, 2^25643116 is an apocalyptic number.

It is an amenable number.

25643116 is a deficient number, since it is larger than the sum of its proper divisors (19284564).

25643116 is a wasteful number, since it uses less digits than its factorization.

25643116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7464 (or 7462 counting only the distinct ones).

The product of its digits is 4320, while the sum is 28.

The square root of 25643116 is about 5063.9032376221. The cubic root of 25643116 is about 294.8878861530.

Adding to 25643116 its reverse (61134652), we get a palindrome (86777768).

The spelling of 25643116 in words is "twenty-five million, six hundred forty-three thousand, one hundred sixteen".