165111620223000 has 512 divisors, whose sum is σ = 563587758489600. Its totient is φ = 39912656576000.

The previous prime is 165111620222933. The next prime is 165111620223007. The reversal of 165111620223000 is 322026111561.

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 (165111620223007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 42088099039 + ... + 42088102961.

It is an arithmetic number, because the mean of its divisors is an integer number (1100757340800).

Almost surely, 2^{165111620223000} is an apocalyptic number.

165111620223000 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 165111620223000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (281793879244800).

165111620223000 is an abundant number, since it is smaller than the sum of its proper divisors (398476138266600).

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

165111620223000 is a wasteful number, since it uses less digits than its factorization.

165111620223000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7280 (or 7266 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

Adding to 165111620223000 its reverse (322026111561), we get a palindrome (165433646334561).

The spelling of 165111620223000 in words is "one hundred sixty-five trillion, one hundred eleven billion, six hundred twenty million, two hundred twenty-three thousand".