68184663065 has 4 divisors (see below), whose sum is σ = 81821595684. Its totient is φ = 54547730448.

The previous prime is 68184663059. The next prime is 68184663073. The reversal of 68184663065 is 56036648186.

68184663065 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 48306764944 + 19877898121 = 219788^2 + 140989^2 .

It is a cyclic number.

It is not a de Polignac number, because 68184663065 - 2²⁰ = 68183614489 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68184662998 and 68184663016.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6818466302 + ... + 6818466311.

It is an arithmetic number, because the mean of its divisors is an integer number (20455398921).

Almost surely, 2^68184663065 is an apocalyptic number.

It is an amenable number.

68184663065 is a deficient number, since it is larger than the sum of its proper divisors (13636932619).

68184663065 is a wasteful number, since it uses less digits than its factorization.

68184663065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13636932618.

The product of its (nonzero) digits is 4976640, while the sum is 53.

The spelling of 68184663065 in words is "sixty-eight billion, one hundred eighty-four million, six hundred sixty-three thousand, sixty-five".