165395981304 has 96 divisors (see below), whose sum is σ = 457650573120. Its totient is φ = 53938649088.

The previous prime is 165395981291. The next prime is 165395981371. The reversal of 165395981304 is 403189593561.

165395981304 is a `hidden beast` number, since 1 + 6 + 5 + 39 + 598 + 13 + 0 + 4 = 666.

165395981304 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×165395981304³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10878732 + ... + 10893924.

It is an arithmetic number, because the mean of its divisors is an integer number (4767193470).

Almost surely, 2^165395981304 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 165395981304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (228825286560).

165395981304 is an abundant number, since it is smaller than the sum of its proper divisors (292254591816).

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

165395981304 is a wasteful number, since it uses less digits than its factorization.

165395981304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18469 (or 18462 counting only the distinct ones).

The product of its (nonzero) digits is 3499200, while the sum is 54.

The spelling of 165395981304 in words is "one hundred sixty-five billion, three hundred ninety-five million, nine hundred eighty-one thousand, three hundred four".