25816863 has 8 divisors (see below), whose sum is σ = 36447408. Its totient is φ = 16198784.

The previous prime is 25816859. The next prime is 25816871. The reversal of 25816863 is 36861852.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 25816863 - 2² = 25816859 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25816463) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 253056 + ... + 253157.

It is an arithmetic number, because the mean of its divisors is an integer number (4555926).

Almost surely, 2^25816863 is an apocalyptic number.

25816863 is a deficient number, since it is larger than the sum of its proper divisors (10630545).

25816863 is a wasteful number, since it uses less digits than its factorization.

25816863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506233.

The product of its digits is 69120, while the sum is 39.

The square root of 25816863 is about 5081.0297184724. The cubic root of 25816863 is about 295.5523997994.

The spelling of 25816863 in words is "twenty-five million, eight hundred sixteen thousand, eight hundred sixty-three".