6604020315649 has 4 divisors (see below), whose sum is σ = 6605001166036. Its totient is φ = 6603039465264.

The previous prime is 6604020315637. The next prime is 6604020315667. The reversal of 6604020315649 is 9465130204066.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3940165450225 + 2663854865424 = 1984985^2 + 1632132^2 .

It is a cyclic number.

It is not a de Polignac number, because 6604020315649 - 2¹⁷ = 6604020184577 is a prime.

It is a super-2 number, since 2×6604020315649² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6604020315599 and 6604020315608.

It is not an unprimeable number, because it can be changed into a prime (6604020315749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 490415094 + ... + 490428559.

It is an arithmetic number, because the mean of its divisors is an integer number (1651250291509).

Almost surely, 2^{6604020315649} is an apocalyptic number.

It is an amenable number.

6604020315649 is a deficient number, since it is larger than the sum of its proper divisors (980850387).

6604020315649 is an equidigital number, since it uses as much as digits as its factorization.

6604020315649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 980850386.

The product of its (nonzero) digits is 933120, while the sum is 46.

The spelling of 6604020315649 in words is "six trillion, six hundred four billion, twenty million, three hundred fifteen thousand, six hundred forty-nine".