1606809361 has 8 divisors (see below), whose sum is σ = 1633219200. Its totient is φ = 1580551440.

The previous prime is 1606809353. The next prime is 1606809377. The reversal of 1606809361 is 1639086061.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1606809361 - 2³ = 1606809353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1606809301) 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 in 7 ways as a sum of consecutive naturals, for example, 16555 + ... + 59056.

It is an arithmetic number, because the mean of its divisors is an integer number (204152400).

Almost surely, 2^1606809361 is an apocalyptic number.

It is an amenable number.

1606809361 is a deficient number, since it is larger than the sum of its proper divisors (26409839).

1606809361 is an equidigital number, since it uses as much as digits as its factorization.

1606809361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75959.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 1606809361 is about 40085.0266433740. The cubic root of 1606809361 is about 1171.2639713935.

The spelling of 1606809361 in words is "one billion, six hundred six million, eight hundred nine thousand, three hundred sixty-one".