268516543 has 4 divisors (see below), whose sum is σ = 268574680. Its totient is φ = 268458408.

The previous prime is 268516529. The next prime is 268516561. The reversal of 268516543 is 345615862.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 268516543 - 2¹⁷ = 268385471 is a prime.

It is a super-4 number, since 4×268516543⁴ (a number of 35 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 268516496 and 268516505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268516243) 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 3 ways as a sum of consecutive naturals, for example, 21480 + ... + 31597.

It is an arithmetic number, because the mean of its divisors is an integer number (67143670).

Almost surely, 2^268516543 is an apocalyptic number.

268516543 is a deficient number, since it is larger than the sum of its proper divisors (58137).

268516543 is an equidigital number, since it uses as much as digits as its factorization.

268516543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58136.

The product of its digits is 172800, while the sum is 40.

The square root of 268516543 is about 16386.4743920100. The cubic root of 268516543 is about 645.1445246319.

The spelling of 268516543 in words is "two hundred sixty-eight million, five hundred sixteen thousand, five hundred forty-three".