268843918405 has 8 divisors (see below), whose sum is σ = 333737278200. Its totient is φ = 207658750656.

The previous prime is 268843918393. The next prime is 268843918433. The reversal of 268843918405 is 504819348862.

It can be written as a sum of positive squares in 4 ways, for example, as 99200431521 + 169643486884 = 314961^2 + 411878^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 268843918405 - 2³³ = 260253983813 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 268843918405.

It is a congruent number.

It is an unprimeable number.

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, 927047850 + ... + 927048139.

It is an arithmetic number, because the mean of its divisors is an integer number (41717159775).

Almost surely, 2^268843918405 is an apocalyptic number.

It is an amenable number.

268843918405 is a deficient number, since it is larger than the sum of its proper divisors (64893359795).

268843918405 is a wasteful number, since it uses less digits than its factorization.

268843918405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1854096023.

The product of its (nonzero) digits is 13271040, while the sum is 58.

The spelling of 268843918405 in words is "two hundred sixty-eight billion, eight hundred forty-three million, nine hundred eighteen thousand, four hundred five".