268118181 has 14 divisors (see below), whose sum is σ = 401994470. Its totient is φ = 178744968.

The previous prime is 268118171. The next prime is 268118183. The reversal of 268118181 is 181811862.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 266832225 + 1285956 = 16335^2 + 1134^2 .

It is not a de Polignac number, because 268118181 - 2⁹ = 268117669 is a prime.

It is a super-2 number, since 2×268118181² = 143774717965497522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268118183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 183166 + ... + 184623.

Almost surely, 2^268118181 is an apocalyptic number.

It is an amenable number.

268118181 is a deficient number, since it is larger than the sum of its proper divisors (133876289).

268118181 is an frugal number, since it uses more digits than its factorization.

268118181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367807 (or 367792 counting only the distinct ones).

The product of its digits is 6144, while the sum is 36.

The square root of 268118181 is about 16374.3146726817. The cubic root of 268118181 is about 644.8253285806.

The spelling of 268118181 in words is "two hundred sixty-eight million, one hundred eighteen thousand, one hundred eighty-one".