1604336321449 has 2 divisors, whose sum is σ = 1604336321450. Its totient is φ = 1604336321448.

The previous prime is 1604336321417. The next prime is 1604336321527. The reversal of 1604336321449 is 9441236334061.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1055485007424 + 548851314025 = 1027368^2 + 740845^2 .

It is a cyclic number.

It is not a de Polignac number, because 1604336321449 - 2⁵ = 1604336321417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1604336321399 and 1604336321408.

It is not a weakly prime, because it can be changed into another prime (1604336321249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 802168160724 + 802168160725.

It is an arithmetic number, because the mean of its divisors is an integer number (802168160725).

Almost surely, 2^{1604336321449} is an apocalyptic number.

It is an amenable number.

1604336321449 is a deficient number, since it is larger than the sum of its proper divisors (1).

1604336321449 is an equidigital number, since it uses as much as digits as its factorization.

1604336321449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1119744, while the sum is 46.

The spelling of 1604336321449 in words is "one trillion, six hundred four billion, three hundred thirty-six million, three hundred twenty-one thousand, four hundred forty-nine".