13147668081549 has 64 divisors (see below), whose sum is σ = 20433945600000. Its totient is φ = 8343570074112.

The previous prime is 13147668081529. The next prime is 13147668081553. The reversal of 13147668081549 is 94518086674131.

13147668081549 is a `hidden beast` number, since 1 + 3 + 1 + 4 + 7 + 6 + 6 + 8 + 0 + 81 + 549 = 666.

It is not a de Polignac number, because 13147668081549 - 2¹⁹ = 13147667557261 is a prime.

It is a super-2 number, since 2×13147668081549² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13147668081529) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 145653172 + ... + 145743410.

It is an arithmetic number, because the mean of its divisors is an integer number (319280400000).

Almost surely, 2^{13147668081549} is an apocalyptic number.

It is an amenable number.

13147668081549 is a deficient number, since it is larger than the sum of its proper divisors (7286277518451).

13147668081549 is a wasteful number, since it uses less digits than its factorization.

13147668081549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92899 (or 92893 counting only the distinct ones).

The product of its (nonzero) digits is 34836480, while the sum is 63.

The spelling of 13147668081549 in words is "thirteen trillion, one hundred forty-seven billion, six hundred sixty-eight million, eighty-one thousand, five hundred forty-nine".