16871721883 has 4 divisors (see below), whose sum is σ = 17415971008. Its totient is φ = 16327472760.

The previous prime is 16871721857. The next prime is 16871721913. The reversal of 16871721883 is 38812717861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 38812717861 = 102139 ⋅379999.

It is a cyclic number.

It is not a de Polignac number, because 16871721883 - 2⁹ = 16871721371 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 16871721883.

It is not an unprimeable number, because it can be changed into a prime (16871721983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 272124516 + ... + 272124577.

It is an arithmetic number, because the mean of its divisors is an integer number (4353992752).

Almost surely, 2^16871721883 is an apocalyptic number.

16871721883 is a deficient number, since it is larger than the sum of its proper divisors (544249125).

16871721883 is an equidigital number, since it uses as much as digits as its factorization.

16871721883 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 544249124.

The product of its digits is 903168, while the sum is 52.

The spelling of 16871721883 in words is "sixteen billion, eight hundred seventy-one million, seven hundred twenty-one thousand, eight hundred eighty-three".