268891159 has 4 divisors (see below), whose sum is σ = 284708304. Its totient is φ = 253074016.

The previous prime is 268891153. The next prime is 268891163. The reversal of 268891159 is 951198862.

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

It is a cyclic number.

It is not a de Polignac number, because 268891159 - 2³ = 268891151 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 (268891151) 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, 7908547 + ... + 7908580.

It is an arithmetic number, because the mean of its divisors is an integer number (71177076).

Almost surely, 2^268891159 is an apocalyptic number.

268891159 is a deficient number, since it is larger than the sum of its proper divisors (15817145).

268891159 is a wasteful number, since it uses less digits than its factorization.

268891159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15817144.

The product of its digits is 311040, while the sum is 49.

The square root of 268891159 is about 16397.9010547082. The cubic root of 268891159 is about 645.4444057901. Note that the first 4 decimals are identical.

The spelling of 268891159 in words is "two hundred sixty-eight million, eight hundred ninety-one thousand, one hundred fifty-nine".