13161305443172 has 6 divisors (see below), whose sum is σ = 23032284525558. Its totient is φ = 6580652721584.

The previous prime is 13161305443157. The next prime is 13161305443207. The reversal of 13161305443172 is 27134450316131.

It can be written as a sum of positive squares in only one way, i.e., 13087073171236 + 74232271936 = 3617606^2 + 272456^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1645163180393 + ... + 1645163180400.

It is an arithmetic number, because the mean of its divisors is an integer number (3838714087593).

Almost surely, 2^{13161305443172} is an apocalyptic number.

It is an amenable number.

13161305443172 is a deficient number, since it is larger than the sum of its proper divisors (9870979082386).

13161305443172 is a wasteful number, since it uses less digits than its factorization.

13161305443172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3290326360797 (or 3290326360795 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 41.

The spelling of 13161305443172 in words is "thirteen trillion, one hundred sixty-one billion, three hundred five million, four hundred forty-three thousand, one hundred seventy-two".