268561418 has 4 divisors (see below), whose sum is σ = 402842130. Its totient is φ = 134280708.

The previous prime is 268561411. The next prime is 268561457. The reversal of 268561418 is 814165862.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 814165862 = 2 ⋅407082931.

It can be written as a sum of positive squares in only one way, i.e., 202578289 + 65983129 = 14233^2 + 8123^2 .

It is not an unprimeable number, because it can be changed into a prime (268561411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67140353 + ... + 67140356.

Almost surely, 2^268561418 is an apocalyptic number.

268561418 is a deficient number, since it is larger than the sum of its proper divisors (134280712).

268561418 is a wasteful number, since it uses less digits than its factorization.

268561418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134280711.

The product of its digits is 92160, while the sum is 41.

The square root of 268561418 is about 16387.8436043306. The cubic root of 268561418 is about 645.1804618937.

The spelling of 268561418 in words is "two hundred sixty-eight million, five hundred sixty-one thousand, four hundred eighteen".