13165112646 has 96 divisors (see below), whose sum is σ = 34399572480. Its totient is φ = 3557423232.

The previous prime is 13165112627. The next prime is 13165112663. The reversal of 13165112646 is 64621156131.

13165112646 is a `hidden beast` number, since 1 + 3 + 1 + 6 + 5 + 1 + 1 + 2 + 646 = 666.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 13165112646.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 232401 + ... + 283443.

It is an arithmetic number, because the mean of its divisors is an integer number (358328880).

Almost surely, 2^13165112646 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13165112646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17199786240).

13165112646 is an abundant number, since it is smaller than the sum of its proper divisors (21234459834).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13165112646 is a wasteful number, since it uses less digits than its factorization.

13165112646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51170 (or 51167 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

Adding to 13165112646 its reverse (64621156131), we get a palindrome (77786268777).

The spelling of 13165112646 in words is "thirteen billion, one hundred sixty-five million, one hundred twelve thousand, six hundred forty-six".