165128712 has 32 divisors (see below), whose sum is σ = 471796800. Its totient is φ = 47179584.

The previous prime is 165128699. The next prime is 165128737. The reversal of 165128712 is 217821561.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 491287 + ... + 491622.

It is an arithmetic number, because the mean of its divisors is an integer number (14743650).

Almost surely, 2^165128712 is an apocalyptic number.

165128712 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

165128712 is an abundant number, since it is smaller than the sum of its proper divisors (306668088).

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

165128712 is a wasteful number, since it uses less digits than its factorization.

165128712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 982925 (or 982921 counting only the distinct ones).

The product of its digits is 6720, while the sum is 33.

The square root of 165128712 is about 12850.2417097890. The cubic root of 165128712 is about 548.6232364420.

The spelling of 165128712 in words is "one hundred sixty-five million, one hundred twenty-eight thousand, seven hundred twelve".