268406304691 has 8 divisors (see below), whose sum is σ = 306763073120. Its totient is φ = 230052788928.

The previous prime is 268406304689. The next prime is 268406304713. The reversal of 268406304691 is 196403604862.

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 268406304691 - 2¹ = 268406304689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (268406304611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 633696 + ... + 968701.

It is an arithmetic number, because the mean of its divisors is an integer number (38345384140).

Almost surely, 2^268406304691 is an apocalyptic number.

268406304691 is a deficient number, since it is larger than the sum of its proper divisors (38356768429).

268406304691 is a wasteful number, since it uses less digits than its factorization.

268406304691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1626333.

The product of its (nonzero) digits is 1492992, while the sum is 49.

The spelling of 268406304691 in words is "two hundred sixty-eight billion, four hundred six million, three hundred four thousand, six hundred ninety-one".