13498113581 has 4 divisors (see below), whose sum is σ = 13498613664. Its totient is φ = 13497613500.

The previous prime is 13498113557. The next prime is 13498113613. The reversal of 13498113581 is 18531189431.

13498113581 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13498113581 is a prime.

It is a super-2 number, since 2×13498113581² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13498112581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 207095 + ... + 264356.

It is an arithmetic number, because the mean of its divisors is an integer number (3374653416).

Almost surely, 2^13498113581 is an apocalyptic number.

It is an amenable number.

13498113581 is a deficient number, since it is larger than the sum of its proper divisors (500083).

13498113581 is an equidigital number, since it uses as much as digits as its factorization.

13498113581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500082.

The product of its digits is 103680, while the sum is 44.

The spelling of 13498113581 in words is "thirteen billion, four hundred ninety-eight million, one hundred thirteen thousand, five hundred eighty-one".