3520064512409 has 4 divisors (see below), whose sum is σ = 3727127130804. Its totient is φ = 3313001894016.

The previous prime is 3520064512399. The next prime is 3520064512417. The reversal of 3520064512409 is 9042154600253.

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 1691633194384 + 1828431318025 = 1300628^2 + 1352195^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3520064512409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3520064512429) 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, 103531309172 + ... + 103531309205.

It is an arithmetic number, because the mean of its divisors is an integer number (931781782701).

Almost surely, 2^{3520064512409} is an apocalyptic number.

It is an amenable number.

3520064512409 is a deficient number, since it is larger than the sum of its proper divisors (207062618395).

3520064512409 is a wasteful number, since it uses less digits than its factorization.

3520064512409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207062618394.

The product of its (nonzero) digits is 259200, while the sum is 41.

The spelling of 3520064512409 in words is "three trillion, five hundred twenty billion, sixty-four million, five hundred twelve thousand, four hundred nine".