16504644349 has 2 divisors, whose sum is σ = 16504644350. Its totient is φ = 16504644348.

The previous prime is 16504644319. The next prime is 16504644379. The reversal of 16504644349 is 94344640561.

It is a balanced prime because it is at equal distance from previous prime (16504644319) and next prime (16504644379).

It can be written as a sum of positive squares in only one way, i.e., 15776616025 + 728028324 = 125605^2 + 26982^2 .

It is an emirp because it is prime and its reverse (94344640561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16504644349 - 2¹⁵ = 16504611581 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16504644299 and 16504644308.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16504644319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8252322174 + 8252322175.

It is an arithmetic number, because the mean of its divisors is an integer number (8252322175).

Almost surely, 2^16504644349 is an apocalyptic number.

It is an amenable number.

16504644349 is a deficient number, since it is larger than the sum of its proper divisors (1).

16504644349 is an equidigital number, since it uses as much as digits as its factorization.

16504644349 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1244160, while the sum is 46.

The spelling of 16504644349 in words is "sixteen billion, five hundred four million, six hundred forty-four thousand, three hundred forty-nine".