13081738831857 has 48 divisors (see below), whose sum is σ = 20453991667200. Its totient is φ = 8035495902720.

The previous prime is 13081738831829. The next prime is 13081738831871. The reversal of 13081738831857 is 75813883718031.

It is a happy number.

13081738831857 is a `hidden beast` number, since 1 + 308 + 1 + 7 + 3 + 8 + 8 + 318 + 5 + 7 = 666.

It is not a de Polignac number, because 13081738831857 - 2¹² = 13081738827761 is a prime.

It is a super-3 number, since 3×13081738831857³ (a number of 40 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 13081738831794 and 13081738831803.

It is not an unprimeable number, because it can be changed into a prime (13081738831757) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9085132 + ... + 10426077.

It is an arithmetic number, because the mean of its divisors is an integer number (426124826400).

Almost surely, 2^{13081738831857} is an apocalyptic number.

It is an amenable number.

13081738831857 is a deficient number, since it is larger than the sum of its proper divisors (7372252835343).

13081738831857 is a wasteful number, since it uses less digits than its factorization.

13081738831857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19511358 (or 19511355 counting only the distinct ones).

The product of its (nonzero) digits is 27095040, while the sum is 63.

The spelling of 13081738831857 in words is "thirteen trillion, eighty-one billion, seven hundred thirty-eight million, eight hundred thirty-one thousand, eight hundred fifty-seven".