68080136065 has 4 divisors (see below), whose sum is σ = 81696163284. Its totient is φ = 54464108848.

The previous prime is 68080136041. The next prime is 68080136093. The reversal of 68080136065 is 56063108086.

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 30874355521 + 37205780544 = 175711^2 + 192888^2 .

It is a cyclic number.

It is not a de Polignac number, because 68080136065 - 2³³ = 59490201473 is a prime.

It is a Duffinian number.

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, 6808013602 + ... + 6808013611.

It is an arithmetic number, because the mean of its divisors is an integer number (20424040821).

Almost surely, 2^68080136065 is an apocalyptic number.

It is an amenable number.

68080136065 is a deficient number, since it is larger than the sum of its proper divisors (13616027219).

68080136065 is a wasteful number, since it uses less digits than its factorization.

68080136065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13616027218.

The product of its (nonzero) digits is 207360, while the sum is 43.

The spelling of 68080136065 in words is "sixty-eight billion, eighty million, one hundred thirty-six thousand, sixty-five".