25863563 has 8 divisors (see below), whose sum is σ = 29188080. Its totient is φ = 22701280.

The previous prime is 25863559. The next prime is 25863571. The reversal of 25863563 is 36536852.

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 25863563 - 2² = 25863559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25863533) 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, 40220 + ... + 40857.

It is an arithmetic number, because the mean of its divisors is an integer number (3648510).

Almost surely, 2^25863563 is an apocalyptic number.

25863563 is a deficient number, since it is larger than the sum of its proper divisors (3324517).

25863563 is a wasteful number, since it uses less digits than its factorization.

25863563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81117.

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

The square root of 25863563 is about 5085.6231673218. The cubic root of 25863563 is about 295.7305002283.

Subtracting 25863563 from its reverse (36536852), we obtain a square (10673289 = 3267²).

The spelling of 25863563 in words is "twenty-five million, eight hundred sixty-three thousand, five hundred sixty-three".