165322520000 has 280 divisors, whose sum is σ = 448674378240. Its totient is φ = 59921280000.

The previous prime is 165322519991. The next prime is 165322520021. The reversal of 165322520000 is 25223561.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 267079691 + ... + 267080309.

Almost surely, 2^165322520000 is an apocalyptic number.

165322520000 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 165322520000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (224337189120).

165322520000 is an abundant number, since it is smaller than the sum of its proper divisors (283351858240).

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

165322520000 is an equidigital number, since it uses as much as digits as its factorization.

165322520000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1269 (or 1244 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

Adding to 165322520000 its reverse (25223561), we get a palindrome (165347743561).

The spelling of 165322520000 in words is "one hundred sixty-five billion, three hundred twenty-two million, five hundred twenty thousand".