17216643871 has 8 divisors (see below), whose sum is σ = 20077719200. Its totient is φ = 14757123024.

The previous prime is 17216643757. The next prime is 17216643877. The reversal of 17216643871 is 17834661271.

It is not a de Polignac number, because 17216643871 - 2¹³ = 17216635679 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17216643877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25096806 + ... + 25097491.

It is an arithmetic number, because the mean of its divisors is an integer number (2509714900).

Almost surely, 2^17216643871 is an apocalyptic number.

17216643871 is a deficient number, since it is larger than the sum of its proper divisors (2861075329).

17216643871 is an frugal number, since it uses more digits than its factorization.

17216643871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50194318 (or 50194304 counting only the distinct ones).

The product of its digits is 338688, while the sum is 46.

The spelling of 17216643871 in words is "seventeen billion, two hundred sixteen million, six hundred forty-three thousand, eight hundred seventy-one".