165322715328 has 168 divisors, whose sum is σ = 485441548800. Its totient is φ = 53775912960.

The previous prime is 165322715297. The next prime is 165322715329. The reversal of 165322715328 is 823517223561.

165322715328 is a `hidden beast` number, since 1 + 6 + 53 + 2 + 271 + 5 + 328 = 666.

It is a super-2 number, since 2×165322715328² (a number of 23 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (165322715329) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4443748 + ... + 4480796.

Almost surely, 2^165322715328 is an apocalyptic number.

165322715328 is a gapful number since it is divisible by the number (18) 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 165322715328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (242720774400).

165322715328 is an abundant number, since it is smaller than the sum of its proper divisors (320118833472).

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

165322715328 is a wasteful number, since it uses less digits than its factorization.

165322715328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37255 (or 37242 counting only the distinct ones).

The product of its digits is 604800, while the sum is 45.

Adding to 165322715328 its reverse (823517223561), we get a palindrome (988839938889).

The spelling of 165322715328 in words is "one hundred sixty-five billion, three hundred twenty-two million, seven hundred fifteen thousand, three hundred twenty-eight".