25841564 has 36 divisors (see below), whose sum is σ = 54959184. Its totient is φ = 10378752.

The previous prime is 25841561. The next prime is 25841597. The reversal of 25841564 is 46514852.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25841561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 110792 + ... + 111024.

It is an arithmetic number, because the mean of its divisors is an integer number (1526644).

Almost surely, 2^25841564 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25841564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27479592).

25841564 is an abundant number, since it is smaller than the sum of its proper divisors (29117620).

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

25841564 is a wasteful number, since it uses less digits than its factorization.

25841564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494 (or 259 counting only the distinct ones).

The product of its digits is 38400, while the sum is 35.

The square root of 25841564 is about 5083.4598454202. The cubic root of 25841564 is about 295.6466290733.

The spelling of 25841564 in words is "twenty-five million, eight hundred forty-one thousand, five hundred sixty-four".