165311523072 has 108 divisors (see below), whose sum is σ = 480387747840. Its totient is φ = 54669855744.

The previous prime is 165311523071. The next prime is 165311523079. The reversal of 165311523072 is 270325113561.

165311523072 is a `hidden beast` number, since 1 + 6 + 53 + 11 + 523 + 0 + 72 = 666.

165311523072 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (165311523071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10129 + ... + 575087.

Almost surely, 2^165311523072 is an apocalyptic number.

165311523072 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 165311523072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (240193873920).

165311523072 is an abundant number, since it is smaller than the sum of its proper divisors (315076224768).

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

165311523072 is a wasteful number, since it uses less digits than its factorization.

165311523072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 565108 (or 565091 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 36.

The spelling of 165311523072 in words is "one hundred sixty-five billion, three hundred eleven million, five hundred twenty-three thousand, seventy-two".