165172130500 has 96 divisors (see below), whose sum is σ = 389572485120. Its totient is φ = 60815894400.

The previous prime is 165172130489. The next prime is 165172130531. The reversal of 165172130500 is 5031271561.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 2298109 + ... + 2368891.

It is an arithmetic number, because the mean of its divisors is an integer number (4058046720).

Almost surely, 2^165172130500 is an apocalyptic number.

165172130500 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 165172130500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (194786242560).

165172130500 is an abundant number, since it is smaller than the sum of its proper divisors (224400354620).

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

165172130500 is a wasteful number, since it uses less digits than its factorization.

165172130500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71174 (or 71162 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 31.

The spelling of 165172130500 in words is "one hundred sixty-five billion, one hundred seventy-two million, one hundred thirty thousand, five hundred".