165140944 has 10 divisors (see below), whose sum is σ = 319960610. Its totient is φ = 82570464.

The previous prime is 165140933. The next prime is 165140947. The reversal of 165140944 is 449041561.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 164352400 + 788544 = 12820^2 + 888^2 .

It is a super-2 number, since 2×165140944² = 54543062770422272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165140947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5160639 + ... + 5160670.

It is an arithmetic number, because the mean of its divisors is an integer number (31996061).

Almost surely, 2^165140944 is an apocalyptic number.

It is an amenable number.

165140944 is a deficient number, since it is larger than the sum of its proper divisors (154819666).

165140944 is a wasteful number, since it uses less digits than its factorization.

165140944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10321317 (or 10321311 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 165140944 is about 12850.7176453302. The cubic root of 165140944 is about 548.6367826300.

The spelling of 165140944 in words is "one hundred sixty-five million, one hundred forty thousand, nine hundred forty-four".