3605656009 has 4 divisors (see below), whose sum is σ = 3631974804. Its totient is φ = 3579337216.

The previous prime is 3605656001. The next prime is 3605656013. The reversal of 3605656009 is 9006565063.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9006565063 = 7253 ⋅1241771.

It can be written as a sum of positive squares in 2 ways, for example, as 2207120400 + 1398535609 = 46980^2 + 37397^2 .

It is a cyclic number.

It is not a de Polignac number, because 3605656009 - 2³ = 3605656001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3605656001) 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 3 ways as a sum of consecutive naturals, for example, 13159192 + ... + 13159465.

It is an arithmetic number, because the mean of its divisors is an integer number (907993701).

Almost surely, 2^3605656009 is an apocalyptic number.

It is an amenable number.

3605656009 is a deficient number, since it is larger than the sum of its proper divisors (26318795).

3605656009 is a wasteful number, since it uses less digits than its factorization.

3605656009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26318794.

The product of its (nonzero) digits is 145800, while the sum is 40.

The square root of 3605656009 is about 60047.1149098772. The cubic root of 3605656009 is about 1533.4210842607.

The spelling of 3605656009 in words is "three billion, six hundred five million, six hundred fifty-six thousand, nine".