16810399369 has 2 divisors, whose sum is σ = 16810399370. Its totient is φ = 16810399368.

The previous prime is 16810399343. The next prime is 16810399393. The reversal of 16810399369 is 96399301861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16560601344 + 249798025 = 128688^2 + 15805^2 .

It is an emirp because it is prime and its reverse (96399301861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16810399369 - 2²⁵ = 16776844937 is a prime.

It is a super-2 number, since 2×16810399369² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16810399399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8405199684 + 8405199685.

It is an arithmetic number, because the mean of its divisors is an integer number (8405199685).

Almost surely, 2^16810399369 is an apocalyptic number.

It is an amenable number.

16810399369 is a deficient number, since it is larger than the sum of its proper divisors (1).

16810399369 is an equidigital number, since it uses as much as digits as its factorization.

16810399369 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1889568, while the sum is 55.

The spelling of 16810399369 in words is "sixteen billion, eight hundred ten million, three hundred ninety-nine thousand, three hundred sixty-nine".