13216985417 has 2 divisors, whose sum is σ = 13216985418. Its totient is φ = 13216985416.

The previous prime is 13216985407. The next prime is 13216985491. The reversal of 13216985417 is 71458961231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12578968336 + 638017081 = 112156^2 + 25259^2 .

It is a cyclic number.

It is not a de Polignac number, because 13216985417 - 2²⁰ = 13215936841 is a prime.

It is not a weakly prime, because it can be changed into another prime (13216985407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6608492708 + 6608492709.

It is an arithmetic number, because the mean of its divisors is an integer number (6608492709).

Almost surely, 2^13216985417 is an apocalyptic number.

It is an amenable number.

13216985417 is a deficient number, since it is larger than the sum of its proper divisors (1).

13216985417 is an equidigital number, since it uses as much as digits as its factorization.

13216985417 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 47.

The spelling of 13216985417 in words is "thirteen billion, two hundred sixteen million, nine hundred eighty-five thousand, four hundred seventeen".