268196018 has 16 divisors (see below), whose sum is σ = 405838296. Its totient is φ = 132921600.

The previous prime is 268196011. The next prime is 268196021. The reversal of 268196018 is 810691862.

It can be written as a sum of positive squares in 4 ways, for example, as 247338529 + 20857489 = 15727^2 + 4567^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (268196011) 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 7 ways as a sum of consecutive naturals, for example, 137780 + ... + 139712.

Almost surely, 2^268196018 is an apocalyptic number.

268196018 is a deficient number, since it is larger than the sum of its proper divisors (137642278).

268196018 is a wasteful number, since it uses less digits than its factorization.

268196018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2509.

The product of its (nonzero) digits is 41472, while the sum is 41.

The square root of 268196018 is about 16376.6913019694. The cubic root of 268196018 is about 644.8877219783.

The spelling of 268196018 in words is "two hundred sixty-eight million, one hundred ninety-six thousand, eighteen".