268218664605 has 16 divisors (see below), whose sum is σ = 476833181760. Its totient is φ = 143049954384.

The previous prime is 268218664583. The next prime is 268218664607. The reversal of 268218664605 is 506466812862.

268218664605 is a `hidden beast` number, since 2 + 6 + 8 + 21 + 8 + 6 + 6 + 4 + 605 = 666.

268218664605 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 268218664605 - 2¹¹ = 268218662557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268218664607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 993402327 + ... + 993402596.

It is an arithmetic number, because the mean of its divisors is an integer number (29802073860).

Almost surely, 2^268218664605 is an apocalyptic number.

It is an amenable number.

268218664605 is a deficient number, since it is larger than the sum of its proper divisors (208614517155).

268218664605 is a wasteful number, since it uses less digits than its factorization.

268218664605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1986804937 (or 1986804931 counting only the distinct ones).

The product of its (nonzero) digits is 6635520, while the sum is 54.

The spelling of 268218664605 in words is "two hundred sixty-eight billion, two hundred eighteen million, six hundred sixty-four thousand, six hundred five".