165054205020 has 96 divisors (see below), whose sum is σ = 476613377856. Its totient is φ = 42647040000.

The previous prime is 165054205013. The next prime is 165054205021. The reversal of 165054205020 is 20502450561.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165054205021) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 380770 + ... + 689270.

It is an arithmetic number, because the mean of its divisors is an integer number (4964722686).

Almost surely, 2^165054205020 is an apocalyptic number.

165054205020 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 165054205020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (238306688928).

165054205020 is an abundant number, since it is smaller than the sum of its proper divisors (311559172836).

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

165054205020 is a wasteful number, since it uses less digits than its factorization.

165054205020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308791 (or 308789 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

Adding to 165054205020 its reverse (20502450561), we get a palindrome (185556655581).

The spelling of 165054205020 in words is "one hundred sixty-five billion, fifty-four million, two hundred five thousand, twenty".