16676448449 has 2 divisors, whose sum is σ = 16676448450. Its totient is φ = 16676448448.

The previous prime is 16676448443. The next prime is 16676448473. The reversal of 16676448449 is 94484467661.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13175596225 + 3500852224 = 114785^2 + 59168^2 .

It is a cyclic number.

It is not a de Polignac number, because 16676448449 - 2¹² = 16676444353 is a prime.

It is not a weakly prime, because it can be changed into another prime (16676448443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8338224224 + 8338224225.

It is an arithmetic number, because the mean of its divisors is an integer number (8338224225).

Almost surely, 2^16676448449 is an apocalyptic number.

It is an amenable number.

16676448449 is a deficient number, since it is larger than the sum of its proper divisors (1).

16676448449 is an equidigital number, since it uses as much as digits as its factorization.

16676448449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27869184, while the sum is 59.

The spelling of 16676448449 in words is "sixteen billion, six hundred seventy-six million, four hundred forty-eight thousand, four hundred forty-nine".