13509191608445 has 32 divisors (see below), whose sum is σ = 18377566569600. Its totient is φ = 9450609686784.

The previous prime is 13509191608403. The next prime is 13509191608459. The reversal of 13509191608445 is 54480619190531.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 13509191608445 - 2¹⁰ = 13509191607421 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35133491 + ... + 35515919.

It is an arithmetic number, because the mean of its divisors is an integer number (574298955300).

Almost surely, 2^{13509191608445} is an apocalyptic number.

It is an amenable number.

13509191608445 is a deficient number, since it is larger than the sum of its proper divisors (4868374961155).

13509191608445 is a wasteful number, since it uses less digits than its factorization.

13509191608445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411069.

The product of its (nonzero) digits is 4665600, while the sum is 56.

The spelling of 13509191608445 in words is "thirteen trillion, five hundred nine billion, one hundred ninety-one million, six hundred eight thousand, four hundred forty-five".