25798163 has 16 divisors (see below), whose sum is σ = 28188000. Its totient is φ = 23600896.

The previous prime is 25798153. The next prime is 25798183. The reversal of 25798163 is 36189752.

It is not a de Polignac number, because 25798163 - 2⁴ = 25798147 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25798163.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25798103) 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 15 ways as a sum of consecutive naturals, for example, 289823 + ... + 289911.

It is an arithmetic number, because the mean of its divisors is an integer number (1761750).

Almost surely, 2^25798163 is an apocalyptic number.

25798163 is a deficient number, since it is larger than the sum of its proper divisors (2389837).

25798163 is an frugal number, since it uses more digits than its factorization.

25798163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199 (or 165 counting only the distinct ones).

The product of its digits is 90720, while the sum is 41.

The square root of 25798163 is about 5079.1892069503. The cubic root of 25798163 is about 295.4810231333.

The spelling of 25798163 in words is "twenty-five million, seven hundred ninety-eight thousand, one hundred sixty-three".