165128755242 has 32 divisors (see below), whose sum is σ = 379243077120. Its totient is φ = 47405383920.

The previous prime is 165128755241. The next prime is 165128755249. The reversal of 165128755242 is 242557821561.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 165128755191 and 165128755200.

It is not an unprimeable number, because it can be changed into a prime (165128755241) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 65839558 + ... + 65842065.

It is an arithmetic number, because the mean of its divisors is an integer number (11851346160).

Almost surely, 2^165128755242 is an apocalyptic number.

165128755242 is an abundant number, since it is smaller than the sum of its proper divisors (214114321878).

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

165128755242 is a wasteful number, since it uses less digits than its factorization.

165128755242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131681658.

The product of its digits is 1344000, while the sum is 48.

The spelling of 165128755242 in words is "one hundred sixty-five billion, one hundred twenty-eight million, seven hundred fifty-five thousand, two hundred forty-two".