13138185597681 has 8 divisors (see below), whose sum is σ = 17518505429664. Its totient is φ = 8758328082080.

The previous prime is 13138185597653. The next prime is 13138185597703. The reversal of 13138185597681 is 18679558183131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13138185597681 - 2¹⁸ = 13138185335537 is a prime.

It is a super-2 number, since 2×13138185597681² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13138185597781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115512780 + ... + 115626461.

It is an arithmetic number, because the mean of its divisors is an integer number (2189813178708).

Almost surely, 2^{13138185597681} is an apocalyptic number.

It is an amenable number.

13138185597681 is a deficient number, since it is larger than the sum of its proper divisors (4380319831983).

13138185597681 is a wasteful number, since it uses less digits than its factorization.

13138185597681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231158191.

The product of its digits is 43545600, while the sum is 66.

The spelling of 13138185597681 in words is "thirteen trillion, one hundred thirty-eight billion, one hundred eighty-five million, five hundred ninety-seven thousand, six hundred eighty-one".