16991365211 has 2 divisors, whose sum is σ = 16991365212. Its totient is φ = 16991365210.

The previous prime is 16991365199. The next prime is 16991365243. The reversal of 16991365211 is 11256319961.

It is a weak prime.

It is an emirp because it is prime and its reverse (11256319961) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16991365211 - 2¹⁴ = 16991348827 is a prime.

It is not a weakly prime, because it can be changed into another prime (16991365291) 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 as a sum of consecutive naturals, namely, 8495682605 + 8495682606.

It is an arithmetic number, because the mean of its divisors is an integer number (8495682606).

Almost surely, 2^16991365211 is an apocalyptic number.

16991365211 is a deficient number, since it is larger than the sum of its proper divisors (1).

16991365211 is an equidigital number, since it uses as much as digits as its factorization.

16991365211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 87480, while the sum is 44.

The spelling of 16991365211 in words is "sixteen billion, nine hundred ninety-one million, three hundred sixty-five thousand, two hundred eleven".