13281374673557 has 2 divisors, whose sum is σ = 13281374673558. Its totient is φ = 13281374673556.

The previous prime is 13281374673389. The next prime is 13281374673607. The reversal of 13281374673557 is 75537647318231.

13281374673557 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11633106418756 + 1648268254801 = 3410734^2 + 1283849^2 .

It is a cyclic number.

It is not a de Polignac number, because 13281374673557 - 2²² = 13281370479253 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13281374673557.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13281374673857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6640687336778 + 6640687336779.

It is an arithmetic number, because the mean of its divisors is an integer number (6640687336779).

Almost surely, 2^{13281374673557} is an apocalyptic number.

It is an amenable number.

13281374673557 is a deficient number, since it is larger than the sum of its proper divisors (1).

13281374673557 is an equidigital number, since it uses as much as digits as its factorization.

13281374673557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 88905600, while the sum is 62.

The spelling of 13281374673557 in words is "thirteen trillion, two hundred eighty-one billion, three hundred seventy-four million, six hundred seventy-three thousand, five hundred fifty-seven".