1606040609 has 8 divisors (see below), whose sum is σ = 1732599720. Its totient is φ = 1483046656.

The previous prime is 1606040599. The next prime is 1606040627. The reversal of 1606040609 is 9060406061.

It can be written as a sum of positive squares in 4 ways, for example, as 273571600 + 1332469009 = 16540^2 + 36503^2 .

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 1606040609 - 2⁸ = 1606040353 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1606040699) 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 7 ways as a sum of consecutive naturals, for example, 890354 + ... + 892155.

It is an arithmetic number, because the mean of its divisors is an integer number (216574965).

Almost surely, 2^1606040609 is an apocalyptic number.

It is an amenable number.

1606040609 is a deficient number, since it is larger than the sum of its proper divisors (126559111).

1606040609 is a wasteful number, since it uses less digits than its factorization.

1606040609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1782579.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 1606040609 is about 40075.4364792200. The cubic root of 1606040609 is about 1171.0771508167.

The spelling of 1606040609 in words is "one billion, six hundred six million, forty thousand, six hundred nine".