3205908511009 has 4 divisors (see below), whose sum is σ = 3206034490516. Its totient is φ = 3205782531504.

The previous prime is 3205908510971. The next prime is 3205908511019. The reversal of 3205908511009 is 9001158095023.

It is a happy number.

3205908511009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 1039206942225 + 2166701568784 = 1019415^2 + 1471972^2 .

It is a cyclic number.

It is not a de Polignac number, because 3205908511009 - 2¹¹ = 3205908508961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3205908511019) 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, 62951574 + ... + 63002479.

It is an arithmetic number, because the mean of its divisors is an integer number (801508622629).

Almost surely, 2^{3205908511009} is an apocalyptic number.

It is an amenable number.

3205908511009 is a deficient number, since it is larger than the sum of its proper divisors (125979507).

3205908511009 is a wasteful number, since it uses less digits than its factorization.

3205908511009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125979506.

The product of its (nonzero) digits is 97200, while the sum is 43.

The spelling of 3205908511009 in words is "three trillion, two hundred five billion, nine hundred eight million, five hundred eleven thousand, nine".