165139180 has 24 divisors (see below), whose sum is σ = 347290272. Its totient is φ = 65960832.

The previous prime is 165139159. The next prime is 165139181. The reversal of 165139180 is 81931561.

It is not an unprimeable number, because it can be changed into a prime (165139181) 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 7 ways as a sum of consecutive naturals, for example, 9304 + ... + 20416.

It is an arithmetic number, because the mean of its divisors is an integer number (14470428).

Almost surely, 2^165139180 is an apocalyptic number.

165139180 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165139180 is an abundant number, since it is smaller than the sum of its proper divisors (182151092).

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

165139180 is a wasteful number, since it uses less digits than its factorization.

165139180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11865 (or 11863 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 34.

The square root of 165139180 is about 12850.6490108477. The cubic root of 165139180 is about 548.6348291497.

The spelling of 165139180 in words is "one hundred sixty-five million, one hundred thirty-nine thousand, one hundred eighty".