165725718912 has 192 divisors, whose sum is σ = 514236537360. Its totient is φ = 50927063040.

The previous prime is 165725718887. The next prime is 165725718929. The reversal of 165725718912 is 219817527561.

165725718912 is a `hidden beast` number, since 1 + 6 + 57 + 2 + 571 + 8 + 9 + 12 = 666.

165725718912 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (192).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12378462 + ... + 12391842.

Almost surely, 2^165725718912 is an apocalyptic number.

165725718912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 165725718912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (257118268680).

165725718912 is an abundant number, since it is smaller than the sum of its proper divisors (348510818448).

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

165725718912 is a wasteful number, since it uses less digits than its factorization.

165725718912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14241 (or 14226 counting only the distinct ones).

The product of its digits is 2116800, while the sum is 54.

The spelling of 165725718912 in words is "one hundred sixty-five billion, seven hundred twenty-five million, seven hundred eighteen thousand, nine hundred twelve".