13217326031648 has 18 divisors (see below), whose sum is σ = 26021651113899. Its totient is φ = 6608652732896.

The previous prime is 13217326031621. The next prime is 13217326031681. The reversal of 13217326031648 is 84613062371231.

It is a happy number.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 6608663015824 + 6608663015824 = 2570732^2 + 2570732^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=2570732.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 20244515 + ... + 20887197.

Almost surely, 2^{13217326031648} is an apocalyptic number.

It is an amenable number.

13217326031648 is a deficient number, since it is larger than the sum of its proper divisors (12804325082251).

13217326031648 is an frugal number, since it uses more digits than its factorization.

13217326031648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1285376 (or 642685 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 47.

The spelling of 13217326031648 in words is "thirteen trillion, two hundred seventeen billion, three hundred twenty-six million, thirty-one thousand, six hundred forty-eight".