165799173000 has 128 divisors (see below), whose sum is σ = 517453297920. Its totient is φ = 44199449600.

The previous prime is 165799172963. The next prime is 165799173017. The reversal of 165799173000 is 371997561.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13004629 + ... + 13017371.

It is an arithmetic number, because the mean of its divisors is an integer number (4042603890).

Almost surely, 2^165799173000 is an apocalyptic number.

165799173000 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 165799173000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (258726648960).

165799173000 is an abundant number, since it is smaller than the sum of its proper divisors (351654124920).

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

165799173000 is a wasteful number, since it uses less digits than its factorization.

165799173000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17104 (or 17090 counting only the distinct ones).

The product of its (nonzero) digits is 357210, while the sum is 48.

The spelling of 165799173000 in words is "one hundred sixty-five billion, seven hundred ninety-nine million, one hundred seventy-three thousand".