68616830693 has 4 divisors (see below), whose sum is σ = 68640817068. Its totient is φ = 68592844320.

The previous prime is 68616830671. The next prime is 68616830701. The reversal of 68616830693 is 39603861686.

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 25045278049 + 43571552644 = 158257^2 + 208738^2 .

It is a cyclic number.

It is not a de Polignac number, because 68616830693 - 2¹⁰ = 68616829669 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68616839693) 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, 11988896 + ... + 11994617.

It is an arithmetic number, because the mean of its divisors is an integer number (17160204267).

Almost surely, 2^68616830693 is an apocalyptic number.

It is an amenable number.

68616830693 is a deficient number, since it is larger than the sum of its proper divisors (23986375).

68616830693 is a wasteful number, since it uses less digits than its factorization.

68616830693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23986374.

The product of its (nonzero) digits is 6718464, while the sum is 56.

The spelling of 68616830693 in words is "sixty-eight billion, six hundred sixteen million, eight hundred thirty thousand, six hundred ninety-three".