13181539841 has 4 divisors (see below), whose sum is σ = 13194451284. Its totient is φ = 13168628400.

The previous prime is 13181539829. The next prime is 13181539859. The reversal of 13181539841 is 14893518131.

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 9980809216 + 3200730625 = 99904^2 + 56575^2 .

It is a cyclic number.

It is not a de Polignac number, because 13181539841 - 2²⁶ = 13114430977 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13181539792 and 13181539801.

It is not an unprimeable number, because it can be changed into a prime (13181439841) 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, 6454190 + ... + 6456231.

It is an arithmetic number, because the mean of its divisors is an integer number (3298612821).

Almost surely, 2^13181539841 is an apocalyptic number.

It is an amenable number.

13181539841 is a deficient number, since it is larger than the sum of its proper divisors (12911443).

13181539841 is a wasteful number, since it uses less digits than its factorization.

13181539841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12911442.

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

The spelling of 13181539841 in words is "thirteen billion, one hundred eighty-one million, five hundred thirty-nine thousand, eight hundred forty-one".