165123944 has 8 divisors (see below), whose sum is σ = 309607410. Its totient is φ = 82561968.

The previous prime is 165123911. The next prime is 165123967. The reversal of 165123944 is 449321561.

It can be written as a sum of positive squares in only one way, i.e., 165122500 + 1444 = 12850^2 + 38^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10320239 + ... + 10320254.

Almost surely, 2^165123944 is an apocalyptic number.

It is an amenable number.

165123944 is a deficient number, since it is larger than the sum of its proper divisors (144483466).

165123944 is a wasteful number, since it uses less digits than its factorization.

165123944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20640499 (or 20640495 counting only the distinct ones).

The product of its digits is 25920, while the sum is 35.

The square root of 165123944 is about 12850.0561866476. The cubic root of 165123944 is about 548.6179559939.

The spelling of 165123944 in words is "one hundred sixty-five million, one hundred twenty-three thousand, nine hundred forty-four".