16728737721411 has 4 divisors (see below), whose sum is σ = 22304983628552. Its totient is φ = 11152491814272.

The previous prime is 16728737721337. The next prime is 16728737721413. The reversal of 16728737721411 is 11412773782761.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 16728737721411 - 2²³ = 16728729332803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16728737721413) 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, 2788122953566 + ... + 2788122953571.

It is an arithmetic number, because the mean of its divisors is an integer number (5576245907138).

Almost surely, 2^{16728737721411} is an apocalyptic number.

16728737721411 is a deficient number, since it is larger than the sum of its proper divisors (5576245907141).

16728737721411 is an equidigital number, since it uses as much as digits as its factorization.

16728737721411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5576245907140.

The product of its digits is 5531904, while the sum is 57.

The spelling of 16728737721411 in words is "sixteen trillion, seven hundred twenty-eight billion, seven hundred thirty-seven million, seven hundred twenty-one thousand, four hundred eleven".