4049509165 has 16 divisors (see below), whose sum is σ = 5253596208. Its totient is φ = 2978758656.

The previous prime is 4049509153. The next prime is 4049509171. The reversal of 4049509165 is 5619059404.

It can be written as a sum of positive squares in 8 ways, for example, as 169963369 + 3879545796 = 13037^2 + 62286^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4049509165 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 104502 + ... + 137911.

It is an arithmetic number, because the mean of its divisors is an integer number (328349763).

Almost surely, 2^4049509165 is an apocalyptic number.

It is an amenable number.

4049509165 is a deficient number, since it is larger than the sum of its proper divisors (1204087043).

4049509165 is a wasteful number, since it uses less digits than its factorization.

4049509165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242688.

The product of its (nonzero) digits is 194400, while the sum is 43.

The square root of 4049509165 is about 63635.7538259743. The cubic root of 4049509165 is about 1593.9234573429.

The spelling of 4049509165 in words is "four billion, forty-nine million, five hundred nine thousand, one hundred sixty-five".