68456194156799 has 4 divisors (see below), whose sum is σ = 68592289970736. Its totient is φ = 68320098342864.

The previous prime is 68456194156787. The next prime is 68456194156837. The reversal of 68456194156799 is 99765149165486.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68456194156799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68456194156729) 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, 68047906214 + ... + 68047907219.

It is an arithmetic number, because the mean of its divisors is an integer number (17148072492684).

Almost surely, 2^{68456194156799} is an apocalyptic number.

68456194156799 is a deficient number, since it is larger than the sum of its proper divisors (136095813937).

68456194156799 is a wasteful number, since it uses less digits than its factorization.

68456194156799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136095813936.

The product of its digits is 3527193600, while the sum is 80.

The spelling of 68456194156799 in words is "sixty-eight trillion, four hundred fifty-six billion, one hundred ninety-four million, one hundred fifty-six thousand, seven hundred ninety-nine".