12694644005181 has 16 divisors (see below), whose sum is σ = 17354064336000. Its totient is φ = 8249517895680.

The previous prime is 12694644005179. The next prime is 12694644005189. The reversal of 12694644005181 is 18150044649621.

It is not a de Polignac number, because 12694644005181 - 2¹ = 12694644005179 is a prime.

It is a super-2 number, since 2×12694644005181² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12694644005189) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44614681 + ... + 44898318.

It is an arithmetic number, because the mean of its divisors is an integer number (1084629021000).

Almost surely, 2^{12694644005181} is an apocalyptic number.

It is an amenable number.

12694644005181 is a deficient number, since it is larger than the sum of its proper divisors (4659420330819).

12694644005181 is a wasteful number, since it uses less digits than its factorization.

12694644005181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89514196.

The product of its (nonzero) digits is 1658880, while the sum is 51.

The spelling of 12694644005181 in words is "twelve trillion, six hundred ninety-four billion, six hundred forty-four million, five thousand, one hundred eighty-one".