16871711305 has 4 divisors (see below), whose sum is σ = 20246053572. Its totient is φ = 13497369040.

The previous prime is 16871711267. The next prime is 16871711359. The reversal of 16871711305 is 50311717861.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50311717861 = 3923 ⋅12824807.

It can be written as a sum of positive squares in 2 ways, for example, as 3952888384 + 12918822921 = 62872^2 + 113661^2 .

It is not a de Polignac number, because 16871711305 - 2⁷ = 16871711177 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1687171126 + ... + 1687171135.

It is an arithmetic number, because the mean of its divisors is an integer number (5061513393).

Almost surely, 2^16871711305 is an apocalyptic number.

It is an amenable number.

16871711305 is a deficient number, since it is larger than the sum of its proper divisors (3374342267).

16871711305 is an equidigital number, since it uses as much as digits as its factorization.

16871711305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3374342266.

The product of its (nonzero) digits is 35280, while the sum is 40.

The spelling of 16871711305 in words is "sixteen billion, eight hundred seventy-one million, seven hundred eleven thousand, three hundred five".