13131326457 has 12 divisors (see below), whose sum is σ = 18975979620. Its totient is φ = 8750290848.

The previous prime is 13131326447. The next prime is 13131326459. The reversal of 13131326457 is 75462313131.

13131326457 is a `hidden beast` number, since 1 + 3 + 1 + 3 + 1 + 3 + 2 + 645 + 7 = 666.

13131326457 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 2 ways, for example, as 11565066681 + 1566259776 = 107541^2 + 39576^2 .

It is not a de Polignac number, because 13131326457 - 2⁴ = 13131326441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13131326459) 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 11 ways as a sum of consecutive naturals, for example, 305982 + ... + 346247.

It is an arithmetic number, because the mean of its divisors is an integer number (1581331635).

Almost surely, 2^13131326457 is an apocalyptic number.

It is an amenable number.

13131326457 is a deficient number, since it is larger than the sum of its proper divisors (5844653163).

13131326457 is a wasteful number, since it uses less digits than its factorization.

13131326457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654472 (or 654469 counting only the distinct ones).

The product of its digits is 45360, while the sum is 36.

Adding to 13131326457 its reverse (75462313131), we get a palindrome (88593639588).

The spelling of 13131326457 in words is "thirteen billion, one hundred thirty-one million, three hundred twenty-six thousand, four hundred fifty-seven".