13674531681 has 12 divisors (see below), whose sum is σ = 19778412160. Its totient is φ = 9104211000.

The previous prime is 13674531659. The next prime is 13674531691. The reversal of 13674531681 is 18613547631.

13674531681 is a `hidden beast` number, since 1 + 36 + 7 + 4 + 531 + 6 + 81 = 666.

It is not a de Polignac number, because 13674531681 - 2⁵ = 13674531649 is a prime.

It is a super-2 number, since 2×13674531681² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13674531691) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1004821 + ... + 1018338.

Almost surely, 2^13674531681 is an apocalyptic number.

It is an amenable number.

13674531681 is a deficient number, since it is larger than the sum of its proper divisors (6103880479).

13674531681 is a wasteful number, since it uses less digits than its factorization.

13674531681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2023916 (or 2023913 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The spelling of 13674531681 in words is "thirteen billion, six hundred seventy-four million, five hundred thirty-one thousand, six hundred eighty-one".