13216611623 has 4 divisors (see below), whose sum is σ = 13523974728. Its totient is φ = 12909248520.

The previous prime is 13216611607. The next prime is 13216611673. The reversal of 13216611623 is 32611661231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32611661231 = 1069 ⋅30506699.

It is a cyclic number.

It is not a de Polignac number, because 13216611623 - 2⁴ = 13216611607 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13216611623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13216611673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153681488 + ... + 153681573.

It is an arithmetic number, because the mean of its divisors is an integer number (3380993682).

Almost surely, 2^13216611623 is an apocalyptic number.

13216611623 is a deficient number, since it is larger than the sum of its proper divisors (307363105).

13216611623 is an equidigital number, since it uses as much as digits as its factorization.

13216611623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307363104.

The product of its digits is 7776, while the sum is 32.

The spelling of 13216611623 in words is "thirteen billion, two hundred sixteen million, six hundred eleven thousand, six hundred twenty-three".