255663563 has 8 divisors (see below), whose sum is σ = 269539920. Its totient is φ = 241829280.

The previous prime is 255663547. The next prime is 255663571. The reversal of 255663563 is 365366552.

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 255663563 - 2⁴ = 255663547 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 255663563.

It is not an unprimeable number, because it can be changed into a prime (255663263) 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, 2381 + ... + 22737.

It is an arithmetic number, because the mean of its divisors is an integer number (33692490).

Almost surely, 2^255663563 is an apocalyptic number.

255663563 is a deficient number, since it is larger than the sum of its proper divisors (13876357).

255663563 is a wasteful number, since it uses less digits than its factorization.

255663563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21037.

The product of its digits is 486000, while the sum is 41.

The square root of 255663563 is about 15989.4828871981. The cubic root of 255663563 is about 634.6821423633.

The spelling of 255663563 in words is "two hundred fifty-five million, six hundred sixty-three thousand, five hundred sixty-three".