16516321211 has 8 divisors (see below), whose sum is σ = 17876191200. Its totient is φ = 15169220352.

The previous prime is 16516321207. The next prime is 16516321243. The reversal of 16516321211 is 11212361561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16516321211 - 2² = 16516321207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16516321201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3189590 + ... + 3194763.

It is an arithmetic number, because the mean of its divisors is an integer number (2234523900).

Almost surely, 2^16516321211 is an apocalyptic number.

16516321211 is a deficient number, since it is larger than the sum of its proper divisors (1359869989).

16516321211 is a wasteful number, since it uses less digits than its factorization.

16516321211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6384565.

The product of its digits is 2160, while the sum is 29.

Adding to 16516321211 its reverse (11212361561), we get a palindrome (27728682772).

The spelling of 16516321211 in words is "sixteen billion, five hundred sixteen million, three hundred twenty-one thousand, two hundred eleven".