16416356449 has 2 divisors, whose sum is σ = 16416356450. Its totient is φ = 16416356448.

The previous prime is 16416356447. The next prime is 16416356501. The reversal of 16416356449 is 94465361461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8886455824 + 7529900625 = 94268^2 + 86775^2 .

It is a cyclic number.

It is not a de Polignac number, because 16416356449 - 2¹ = 16416356447 is a prime.

Together with 16416356447, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (16416356447) 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, 8208178224 + 8208178225.

It is an arithmetic number, because the mean of its divisors is an integer number (8208178225).

Almost surely, 2^16416356449 is an apocalyptic number.

It is an amenable number.

16416356449 is a deficient number, since it is larger than the sum of its proper divisors (1).

16416356449 is an equidigital number, since it uses as much as digits as its factorization.

16416356449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1866240, while the sum is 49.

The spelling of 16416356449 in words is "sixteen billion, four hundred sixteen million, three hundred fifty-six thousand, four hundred forty-nine".