255385663 has 4 divisors (see below), whose sum is σ = 275030728. Its totient is φ = 235740600.

The previous prime is 255385579. The next prime is 255385681. The reversal of 255385663 is 366583552.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-255385663 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255385693) 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, 9822513 + ... + 9822538.

It is an arithmetic number, because the mean of its divisors is an integer number (68757682).

Almost surely, 2^255385663 is an apocalyptic number.

255385663 is a deficient number, since it is larger than the sum of its proper divisors (19645065).

255385663 is a wasteful number, since it uses less digits than its factorization.

255385663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19645064.

The product of its digits is 648000, while the sum is 43.

The square root of 255385663 is about 15980.7904372719. The cubic root of 255385663 is about 634.4520977034.

The spelling of 255385663 in words is "two hundred fifty-five million, three hundred eighty-five thousand, six hundred sixty-three".