16065705071721 has 8 divisors (see below), whose sum is σ = 21424422633664. Its totient is φ = 10708728778800.

The previous prime is 16065705071707. The next prime is 16065705071743. The reversal of 16065705071721 is 12717050756061.

16065705071721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a de Polignac number, because none of the positive numbers 2^k-16065705071721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16065705078721) 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, 435295726 + ... + 435332631.

It is an arithmetic number, because the mean of its divisors is an integer number (2678052829208).

Almost surely, 2^{16065705071721} is an apocalyptic number.

It is an amenable number.

16065705071721 is a deficient number, since it is larger than the sum of its proper divisors (5358717561943).

16065705071721 is an equidigital number, since it uses as much as digits as its factorization.

16065705071721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 870634511.

The product of its (nonzero) digits is 617400, while the sum is 48.

The spelling of 16065705071721 in words is "sixteen trillion, sixty-five billion, seven hundred five million, seventy-one thousand, seven hundred twenty-one".