268561111 has 48 divisors (see below), whose sum is σ = 350481600. Its totient is φ = 205470720.

The previous prime is 268561093. The next prime is 268561127. The reversal of 268561111 is 111165862.

It is not a de Polignac number, because 268561111 - 2⁹ = 268560599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268561151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2376591 + ... + 2376703.

It is an arithmetic number, because the mean of its divisors is an integer number (7301700).

Almost surely, 2^268561111 is an apocalyptic number.

268561111 is a deficient number, since it is larger than the sum of its proper divisors (81920489).

268561111 is a wasteful number, since it uses less digits than its factorization.

268561111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201 (or 174 counting only the distinct ones).

The product of its digits is 2880, while the sum is 31.

The square root of 268561111 is about 16387.8342376288. The cubic root of 268561111 is about 645.1802160524.

The spelling of 268561111 in words is "two hundred sixty-eight million, five hundred sixty-one thousand, one hundred eleven".