25878163 has 4 divisors (see below), whose sum is σ = 25889248. Its totient is φ = 25867080.

The previous prime is 25878143. The next prime is 25878173. The reversal of 25878163 is 36187852.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25878163 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25878103) 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, 528 + ... + 7213.

It is an arithmetic number, because the mean of its divisors is an integer number (6472312).

Almost surely, 2^25878163 is an apocalyptic number.

25878163 is a deficient number, since it is larger than the sum of its proper divisors (11085).

25878163 is an equidigital number, since it uses as much as digits as its factorization.

25878163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11084.

The product of its digits is 80640, while the sum is 40.

The square root of 25878163 is about 5087.0583837813. The cubic root of 25878163 is about 295.7861364544.

The spelling of 25878163 in words is "twenty-five million, eight hundred seventy-eight thousand, one hundred sixty-three".