165140188 has 12 divisors (see below), whose sum is σ = 289247112. Its totient is φ = 82498160.

The previous prime is 165140177. The next prime is 165140219. The reversal of 165140188 is 881041561.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12643 + ... + 22138.

It is an arithmetic number, because the mean of its divisors is an integer number (24103926).

Almost surely, 2^165140188 is an apocalyptic number.

It is an amenable number.

165140188 is a deficient number, since it is larger than the sum of its proper divisors (124106924).

165140188 is a wasteful number, since it uses less digits than its factorization.

165140188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35972 (or 35970 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 34.

The square root of 165140188 is about 12850.6882305968. The cubic root of 165140188 is about 548.6359454259.

The spelling of 165140188 in words is "one hundred sixty-five million, one hundred forty thousand, one hundred eighty-eight".