25803645 has 24 divisors (see below), whose sum is σ = 48027744. Its totient is φ = 11795616.

The previous prime is 25803641. The next prime is 25803667. The reversal of 25803645 is 54630852.

It is not a de Polignac number, because 25803645 - 2² = 25803641 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25803641) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16819 + ... + 18288.

It is an arithmetic number, because the mean of its divisors is an integer number (2001156).

Almost surely, 2^25803645 is an apocalyptic number.

It is an amenable number.

25803645 is a deficient number, since it is larger than the sum of its proper divisors (22224099).

25803645 is a wasteful number, since it uses less digits than its factorization.

25803645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35129 (or 35122 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 33.

The square root of 25803645 is about 5079.7288313452. The cubic root of 25803645 is about 295.5019511382.

The spelling of 25803645 in words is "twenty-five million, eight hundred three thousand, six hundred forty-five".