16216983505 has 4 divisors (see below), whose sum is σ = 19460380212. Its totient is φ = 12973586800.

The previous prime is 16216983491. The next prime is 16216983511. The reversal of 16216983505 is 50538961261.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4731788944 + 11485194561 = 68788^2 + 107169^2 .

It is not a de Polignac number, because 16216983505 - 2⁵ = 16216983473 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 1621698346 + ... + 1621698355.

It is an arithmetic number, because the mean of its divisors is an integer number (4865095053).

Almost surely, 2^16216983505 is an apocalyptic number.

It is an amenable number.

16216983505 is a deficient number, since it is larger than the sum of its proper divisors (3243396707).

16216983505 is an equidigital number, since it uses as much as digits as its factorization.

16216983505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3243396706.

The product of its (nonzero) digits is 388800, while the sum is 46.

The spelling of 16216983505 in words is "sixteen billion, two hundred sixteen million, nine hundred eighty-three thousand, five hundred five".