268015813 has 4 divisors (see below), whose sum is σ = 288632428. Its totient is φ = 247399200.

The previous prime is 268015771. The next prime is 268015831. The reversal of 268015813 is 318510862.

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

It can be written as a sum of positive squares in 2 ways, for example, as 47582404 + 220433409 = 6898^2 + 14847^2 .

It is a cyclic number.

It is not a de Polignac number, because 268015813 - 2⁹ = 268015301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268015313) 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 3 ways as a sum of consecutive naturals, for example, 10308288 + ... + 10308313.

It is an arithmetic number, because the mean of its divisors is an integer number (72158107).

Almost surely, 2^268015813 is an apocalyptic number.

It is an amenable number.

268015813 is a deficient number, since it is larger than the sum of its proper divisors (20616615).

268015813 is a wasteful number, since it uses less digits than its factorization.

268015813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20616614.

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 268015813 is about 16371.1885029768. The cubic root of 268015813 is about 644.7432529805.

The spelling of 268015813 in words is "two hundred sixty-eight million, fifteen thousand, eight hundred thirteen".