25645538 has 8 divisors (see below), whose sum is σ = 38723520. Its totient is φ = 12737700.

The previous prime is 25645531. The next prime is 25645547. The reversal of 25645538 is 83554652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (25645531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42158 + ... + 42761.

It is an arithmetic number, because the mean of its divisors is an integer number (4840440).

Almost surely, 2^25645538 is an apocalyptic number.

25645538 is a deficient number, since it is larger than the sum of its proper divisors (13077982).

25645538 is a wasteful number, since it uses less digits than its factorization.

25645538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85072.

The product of its digits is 144000, while the sum is 38.

The square root of 25645538 is about 5064.1423755657. The cubic root of 25645538 is about 294.8971699438.

The spelling of 25645538 in words is "twenty-five million, six hundred forty-five thousand, five hundred thirty-eight".