268491111 has 16 divisors (see below), whose sum is σ = 410834688. Its totient is φ = 152784000.

The previous prime is 268491079. The next prime is 268491127. The reversal of 268491111 is 111194862.

It is not a de Polignac number, because 268491111 - 2⁵ = 268491079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268491151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21465 + ... + 31586.

It is an arithmetic number, because the mean of its divisors is an integer number (25677168).

Almost surely, 2^268491111 is an apocalyptic number.

268491111 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

268491111 is a deficient number, since it is larger than the sum of its proper divisors (142343577).

268491111 is a wasteful number, since it uses less digits than its factorization.

268491111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53302.

The product of its digits is 3456, while the sum is 33.

The square root of 268491111 is about 16385.6983677840. The cubic root of 268491111 is about 645.1241561369.

The spelling of 268491111 in words is "two hundred sixty-eight million, four hundred ninety-one thousand, one hundred eleven".