68342016077 has 4 divisors (see below), whose sum is σ = 68439508956. Its totient is φ = 68244523200.

The previous prime is 68342015993. The next prime is 68342016079. The reversal of 68342016077 is 77061024386.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 77061024386 = 2 ⋅38530512193.

It can be written as a sum of positive squares in 2 ways, for example, as 42619950916 + 25722065161 = 206446^2 + 160381^2 .

It is a cyclic number.

It is not a de Polignac number, because 68342016077 - 2¹⁸ = 68341753933 is a prime.

It is a super-2 number, since 2×68342016077² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68342016079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48745388 + ... + 48746789.

It is an arithmetic number, because the mean of its divisors is an integer number (17109877239).

Almost surely, 2^68342016077 is an apocalyptic number.

It is an amenable number.

68342016077 is a deficient number, since it is larger than the sum of its proper divisors (97492879).

68342016077 is an equidigital number, since it uses as much as digits as its factorization.

68342016077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97492878.

The product of its (nonzero) digits is 338688, while the sum is 44.

The spelling of 68342016077 in words is "sixty-eight billion, three hundred forty-two million, sixteen thousand, seventy-seven".