16809776219 has 2 divisors, whose sum is σ = 16809776220. Its totient is φ = 16809776218.

The previous prime is 16809776149. The next prime is 16809776267. The reversal of 16809776219 is 91267790861.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16809776219 - 2²⁰ = 16808727643 is a prime.

It is a super-2 number, since 2×16809776219² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16809736219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8404888109 + 8404888110.

It is an arithmetic number, because the mean of its divisors is an integer number (8404888110).

Almost surely, 2^16809776219 is an apocalyptic number.

16809776219 is a deficient number, since it is larger than the sum of its proper divisors (1).

16809776219 is an equidigital number, since it uses as much as digits as its factorization.

16809776219 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2286144, while the sum is 56.

The spelling of 16809776219 in words is "sixteen billion, eight hundred nine million, seven hundred seventy-six thousand, two hundred nineteen".