68971721339 has 8 divisors (see below), whose sum is σ = 72428906400. Its totient is φ = 65552737536.

The previous prime is 68971721323. The next prime is 68971721353. The reversal of 68971721339 is 93312717986.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68971721339 - 2⁴ = 68971721323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68971721369) 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 7 ways as a sum of consecutive naturals, for example, 9546614 + ... + 9553835.

It is an arithmetic number, because the mean of its divisors is an integer number (9053613300).

Almost surely, 2^68971721339 is an apocalyptic number.

68971721339 is a deficient number, since it is larger than the sum of its proper divisors (3457185061).

68971721339 is a wasteful number, since it uses less digits than its factorization.

68971721339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19100629.

The product of its digits is 3429216, while the sum is 56.

The spelling of 68971721339 in words is "sixty-eight billion, nine hundred seventy-one million, seven hundred twenty-one thousand, three hundred thirty-nine".