13549444435849 has 27 divisors (see below), whose sum is σ = 15805210444263. Its totient is φ = 11581763104800.

The previous prime is 13549444435841. The next prime is 13549444435871. The reversal of 13549444435849 is 94853444494531.

It is a happy number.

The square root of 13549444435849 is 3680957.

It is a perfect power (a square), and thus also a powerful number.

13549444435849 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 35586181449 + 13513858254400 = 188643^2 + 3676120^2 .

It is not a de Polignac number, because 13549444435849 - 2³ = 13549444435841 is a prime.

It is a super-3 number, since 3×13549444435849³ (a number of 40 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13549444435841) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 17804788629 + ... + 17804789389.

Almost surely, 2^{13549444435849} is an apocalyptic number.

13549444435849 is the 3680957-th square number.

13549444435849 is the 1840479-th centered octagonal number.

It is an amenable number.

13549444435849 is a deficient number, since it is larger than the sum of its proper divisors (2255766008414).

13549444435849 is an frugal number, since it uses more digits than its factorization.

13549444435849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2918 (or 1459 counting only the distinct ones).

The product of its digits is 597196800, while the sum is 67.

The spelling of 13549444435849 in words is "thirteen trillion, five hundred forty-nine billion, four hundred forty-four million, four hundred thirty-five thousand, eight hundred forty-nine".