268909563 has 16 divisors (see below), whose sum is σ = 386749440. Its totient is φ = 165215904.

The previous prime is 268909561. The next prime is 268909567. The reversal of 268909563 is 365909862.

It is not a de Polignac number, because 268909563 - 2¹ = 268909561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (268909561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20470 + ... + 30932.

It is an arithmetic number, because the mean of its divisors is an integer number (24171840).

Almost surely, 2^268909563 is an apocalyptic number.

268909563 is a deficient number, since it is larger than the sum of its proper divisors (117839877).

268909563 is a wasteful number, since it uses less digits than its factorization.

268909563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11138.

The product of its (nonzero) digits is 699840, while the sum is 48.

The square root of 268909563 is about 16398.4622144883. The cubic root of 268909563 is about 645.4591310639.

The spelling of 268909563 in words is "two hundred sixty-eight million, nine hundred nine thousand, five hundred sixty-three".