13604751081 has 24 divisors (see below), whose sum is σ = 19909169280. Its totient is φ = 8950926816.

The previous prime is 13604751071. The next prime is 13604751107. The reversal of 13604751081 is 18015740631.

13604751081 is a `hidden beast` number, since 1 + 3 + 60 + 4 + 7 + 510 + 81 = 666.

It is not a de Polignac number, because 13604751081 - 2⁹ = 13604750569 is a prime.

It is a super-2 number, since 2×13604751081² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13604751011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2953326 + ... + 2957928.

It is an arithmetic number, because the mean of its divisors is an integer number (829548720).

Almost surely, 2^13604751081 is an apocalyptic number.

It is an amenable number.

13604751081 is a deficient number, since it is larger than the sum of its proper divisors (6304418199).

13604751081 is a wasteful number, since it uses less digits than its factorization.

13604751081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8845 (or 8842 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The spelling of 13604751081 in words is "thirteen billion, six hundred four million, seven hundred fifty-one thousand, eighty-one".