25356863 has 6 divisors (see below), whose sum is σ = 29496816. Its totient is φ = 21734412.

The previous prime is 25356847. The next prime is 25356883. The reversal of 25356863 is 36865352.

It is a happy number.

It is not a de Polignac number, because 25356863 - 2⁴ = 25356847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25356883) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 258695 + ... + 258792.

It is an arithmetic number, because the mean of its divisors is an integer number (4916136).

Almost surely, 2^25356863 is an apocalyptic number.

25356863 is a deficient number, since it is larger than the sum of its proper divisors (4139953).

25356863 is an equidigital number, since it uses as much as digits as its factorization.

25356863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517501 (or 517494 counting only the distinct ones).

The product of its digits is 129600, while the sum is 38.

The square root of 25356863 is about 5035.5598497089. The cubic root of 25356863 is about 293.7865041099.

The spelling of 25356863 in words is "twenty-five million, three hundred fifty-six thousand, eight hundred sixty-three".