68809856394067 has 4 divisors (see below), whose sum is σ = 69836869176136. Its totient is φ = 67782843612000.

The previous prime is 68809856393977. The next prime is 68809856394101. The reversal of 68809856394067 is 76049365890886.

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

It is a cyclic number.

It is not a de Polignac number, because 68809856394067 - 2¹⁹ = 68809855869779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68809856344067) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 513506390934 + ... + 513506391067.

It is an arithmetic number, because the mean of its divisors is an integer number (17459217294034).

Almost surely, 2^{68809856394067} is an apocalyptic number.

68809856394067 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

68809856394067 is a deficient number, since it is larger than the sum of its proper divisors (1027012782069).

68809856394067 is a wasteful number, since it uses less digits than its factorization.

68809856394067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1027012782068.

The product of its (nonzero) digits is 3762339840, while the sum is 79.

The spelling of 68809856394067 in words is "sixty-eight trillion, eight hundred nine billion, eight hundred fifty-six million, three hundred ninety-four thousand, sixty-seven".