268560643 has 4 divisors (see below), whose sum is σ = 289219168. Its totient is φ = 247902120.

The previous prime is 268560637. The next prime is 268560683. The reversal of 268560643 is 346065862.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 346065862 = 2 ⋅173032931.

It is a cyclic number.

It is not a de Polignac number, because 268560643 - 2¹⁷ = 268429571 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 268560596 and 268560605.

It is not an unprimeable number, because it can be changed into a prime (268560683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10329243 + ... + 10329268.

It is an arithmetic number, because the mean of its divisors is an integer number (72304792).

Almost surely, 2^268560643 is an apocalyptic number.

268560643 is a deficient number, since it is larger than the sum of its proper divisors (20658525).

268560643 is a wasteful number, since it uses less digits than its factorization.

268560643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20658524.

The product of its (nonzero) digits is 207360, while the sum is 40.

The square root of 268560643 is about 16387.8199587376. The cubic root of 268560643 is about 645.1798412841.

The spelling of 268560643 in words is "two hundred sixty-eight million, five hundred sixty thousand, six hundred forty-three".