16816566049 has 2 divisors, whose sum is σ = 16816566050. Its totient is φ = 16816566048.

The previous prime is 16816566017. The next prime is 16816566061. The reversal of 16816566049 is 94066561861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15533135424 + 1283430625 = 124632^2 + 35825^2 .

It is an emirp because it is prime and its reverse (94066561861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16816566049 - 2⁵ = 16816566017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16816565987 and 16816566005.

It is not a weakly prime, because it can be changed into another prime (16816566089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8408283024 + 8408283025.

It is an arithmetic number, because the mean of its divisors is an integer number (8408283025).

Almost surely, 2^16816566049 is an apocalyptic number.

It is an amenable number.

16816566049 is a deficient number, since it is larger than the sum of its proper divisors (1).

16816566049 is an equidigital number, since it uses as much as digits as its factorization.

16816566049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1866240, while the sum is 52.

The spelling of 16816566049 in words is "sixteen billion, eight hundred sixteen million, five hundred sixty-six thousand, forty-nine".