13216985473 has 8 divisors (see below), whose sum is σ = 13482171560. Its totient is φ = 12953364480.

The previous prime is 13216985417. The next prime is 13216985491. The reversal of 13216985473 is 37458961231.

It can be written as a sum of positive squares in 4 ways, for example, as 2033288464 + 11183697009 = 45092^2 + 105753^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13216985473 - 2³³ = 4627050881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13216985273) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 374208 + ... + 408001.

It is an arithmetic number, because the mean of its divisors is an integer number (1685271445).

Almost surely, 2^13216985473 is an apocalyptic number.

It is an amenable number.

13216985473 is a deficient number, since it is larger than the sum of its proper divisors (265186087).

13216985473 is an equidigital number, since it uses as much as digits as its factorization.

13216985473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 782547.

The product of its digits is 1088640, while the sum is 49.

The spelling of 13216985473 in words is "thirteen billion, two hundred sixteen million, nine hundred eighty-five thousand, four hundred seventy-three".