68729439841 has 8 divisors (see below), whose sum is σ = 74111335200. Its totient is φ = 63524000160.

The previous prime is 68729439817. The next prime is 68729439847. The reversal of 68729439841 is 14893492786.

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 68729439841 - 2⁹ = 68729439329 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68729439841.

It is not an unprimeable number, because it can be changed into a prime (68729439847) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44113111 + ... + 44114668.

It is an arithmetic number, because the mean of its divisors is an integer number (9263916900).

Almost surely, 2^68729439841 is an apocalyptic number.

It is an amenable number.

68729439841 is a deficient number, since it is larger than the sum of its proper divisors (5381895359).

68729439841 is a wasteful number, since it uses less digits than its factorization.

68729439841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88227839.

The product of its digits is 20901888, while the sum is 61.

The spelling of 68729439841 in words is "sixty-eight billion, seven hundred twenty-nine million, four hundred thirty-nine thousand, eight hundred forty-one".