3609435649 has 4 divisors (see below), whose sum is σ = 3621754836. Its totient is φ = 3597116464.

The previous prime is 3609435647. The next prime is 3609435653. The reversal of 3609435649 is 9465349063.

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 3219768049 + 389667600 = 56743^2 + 19740^2 .

It is not a de Polignac number, because 3609435649 - 2¹ = 3609435647 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3609435647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6159154 + ... + 6159739.

It is an arithmetic number, because the mean of its divisors is an integer number (905438709).

Almost surely, 2^3609435649 is an apocalyptic number.

It is an amenable number.

3609435649 is a deficient number, since it is larger than the sum of its proper divisors (12319187).

3609435649 is a wasteful number, since it uses less digits than its factorization.

3609435649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12319186.

The product of its (nonzero) digits is 2099520, while the sum is 49.

The square root of 3609435649 is about 60078.5789529013. The cubic root of 3609435649 is about 1533.9567016059.

The spelling of 3609435649 in words is "three billion, six hundred nine million, four hundred thirty-five thousand, six hundred forty-nine".