16802810009 has 2 divisors, whose sum is σ = 16802810010. Its totient is φ = 16802810008.

The previous prime is 16802809997. The next prime is 16802810039. The reversal of 16802810009 is 90001820861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10525734025 + 6277075984 = 102595^2 + 79228^2 .

It is an emirp because it is prime and its reverse (90001820861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16802810009 - 2²⁸ = 16534374553 is a prime.

It is a super-3 number, since 3×16802810009³ (a number of 32 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (16802810039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8401405004 + 8401405005.

It is an arithmetic number, because the mean of its divisors is an integer number (8401405005).

Almost surely, 2^16802810009 is an apocalyptic number.

It is an amenable number.

16802810009 is a deficient number, since it is larger than the sum of its proper divisors (1).

16802810009 is an equidigital number, since it uses as much as digits as its factorization.

16802810009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 35.

The spelling of 16802810009 in words is "sixteen billion, eight hundred two million, eight hundred ten thousand, nine".