68643391267 has 8 divisors (see below), whose sum is σ = 76907583792. Its totient is φ = 60716512800.

The previous prime is 68643391261. The next prime is 68643391283. The reversal of 68643391267 is 76219334686.

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 68643391267 - 2³ = 68643391259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68643391261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84328084 + ... + 84328897.

It is an arithmetic number, because the mean of its divisors is an integer number (9613447974).

Almost surely, 2^68643391267 is an apocalyptic number.

68643391267 is a deficient number, since it is larger than the sum of its proper divisors (8264192525).

68643391267 is a wasteful number, since it uses less digits than its factorization.

68643391267 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168657029.

The product of its digits is 7838208, while the sum is 55.

The spelling of 68643391267 in words is "sixty-eight billion, six hundred forty-three million, three hundred ninety-one thousand, two hundred sixty-seven".