13197808081 has 4 divisors (see below), whose sum is σ = 13235624500. Its totient is φ = 13159991664.

The previous prime is 13197808079. The next prime is 13197808087. The reversal of 13197808081 is 18080879131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4978572481 + 8219235600 = 70559^2 + 90660^2 .

It is a cyclic number.

It is not a de Polignac number, because 13197808081 - 2¹ = 13197808079 is a prime.

It is a super-2 number, since 2×13197808081² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13197808087) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18907686 + ... + 18908383.

It is an arithmetic number, because the mean of its divisors is an integer number (3308906125).

Almost surely, 2^13197808081 is an apocalyptic number.

It is an amenable number.

13197808081 is a deficient number, since it is larger than the sum of its proper divisors (37816419).

13197808081 is an equidigital number, since it uses as much as digits as its factorization.

13197808081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37816418.

The product of its (nonzero) digits is 96768, while the sum is 46.

The spelling of 13197808081 in words is "thirteen billion, one hundred ninety-seven million, eight hundred eight thousand, eighty-one".