16604810449 has 2 divisors, whose sum is σ = 16604810450. Its totient is φ = 16604810448.

The previous prime is 16604810447. The next prime is 16604810471. The reversal of 16604810449 is 94401840661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12164987025 + 4439823424 = 110295^2 + 66632^2 .

It is a cyclic number.

It is not a de Polignac number, because 16604810449 - 2¹ = 16604810447 is a prime.

Together with 16604810447, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (16604810441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8302405224 + 8302405225.

It is an arithmetic number, because the mean of its divisors is an integer number (8302405225).

Almost surely, 2^16604810449 is an apocalyptic number.

It is an amenable number.

16604810449 is a deficient number, since it is larger than the sum of its proper divisors (1).

16604810449 is an equidigital number, since it uses as much as digits as its factorization.

16604810449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 165888, while the sum is 43.

The spelling of 16604810449 in words is "sixteen billion, six hundred four million, eight hundred ten thousand, four hundred forty-nine".