165275532800000 has 1248 divisors, whose sum is σ = 491756165591040. Its totient is φ = 54344908800000.

The previous prime is 165275532799997. The next prime is 165275532800009. The reversal of 165275532800000 is 8235572561.

It is not an unprimeable number, because it can be changed into a prime (165275532800009) 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 95 ways as a sum of consecutive naturals, for example, 436083199811 + ... + 436083200189.

Almost surely, 2^{165275532800000} is an apocalyptic number.

165275532800000 is a gapful number since it is divisible by the number (10) 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 165275532800000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (245878082795520).

165275532800000 is an abundant number, since it is smaller than the sum of its proper divisors (326480632791040).

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

165275532800000 is an frugal number, since it uses more digits than its factorization.

165275532800000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 623 (or 581 counting only the distinct ones).

The product of its (nonzero) digits is 504000, while the sum is 44.

The spelling of 165275532800000 in words is "one hundred sixty-five trillion, two hundred seventy-five billion, five hundred thirty-two million, eight hundred thousand".