13216985451 has 24 divisors (see below), whose sum is σ = 20283304080. Its totient is φ = 8277546816.

The previous prime is 13216985417. The next prime is 13216985491. The reversal of 13216985451 is 15458961231.

It is a happy number.

13216985451 is a `hidden beast` number, since 1 + 3 + 2 + 16 + 98 + 545 + 1 = 666.

It is not a de Polignac number, because 13216985451 - 2⁶ = 13216985387 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13216985397 and 13216985406.

It is not an unprimeable number, because it can be changed into a prime (13216985491) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 674665 + ... + 693978.

It is an arithmetic number, because the mean of its divisors is an integer number (845137670).

Almost surely, 2^13216985451 is an apocalyptic number.

13216985451 is a deficient number, since it is larger than the sum of its proper divisors (7066318629).

13216985451 is a wasteful number, since it uses less digits than its factorization.

13216985451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1368715 (or 1368712 counting only the distinct ones).

The product of its digits is 259200, while the sum is 45.

The spelling of 13216985451 in words is "thirteen billion, two hundred sixteen million, nine hundred eighty-five thousand, four hundred fifty-one".