68864739085 has 8 divisors (see below), whose sum is σ = 87498727416. Its totient is φ = 51851097600.

The previous prime is 68864739071. The next prime is 68864739101. The reversal of 68864739085 is 58093746886.

It can be written as a sum of positive squares in 4 ways, for example, as 30785509764 + 38079229321 = 175458^2 + 195139^2 .

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

It is not a de Polignac number, because 68864739085 - 2²⁷ = 68730521357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 405086616 + ... + 405086785.

It is an arithmetic number, because the mean of its divisors is an integer number (10937340927).

Almost surely, 2^68864739085 is an apocalyptic number.

It is an amenable number.

68864739085 is a deficient number, since it is larger than the sum of its proper divisors (18633988331).

68864739085 is a wasteful number, since it uses less digits than its factorization.

68864739085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 810173423.

The product of its (nonzero) digits is 69672960, while the sum is 64.

The spelling of 68864739085 in words is "sixty-eight billion, eight hundred sixty-four million, seven hundred thirty-nine thousand, eighty-five".