165819952 has 10 divisors (see below), whose sum is σ = 321276188. Its totient is φ = 82909968.

The previous prime is 165819947. The next prime is 165819959. The reversal of 165819952 is 259918561.

It is not an unprimeable number, because it can be changed into a prime (165819959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5181858 + ... + 5181889.

Almost surely, 2^165819952 is an apocalyptic number.

It is an amenable number.

165819952 is a deficient number, since it is larger than the sum of its proper divisors (155456236).

165819952 is a wasteful number, since it uses less digits than its factorization.

165819952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10363755 (or 10363749 counting only the distinct ones).

The product of its digits is 194400, while the sum is 46.

The square root of 165819952 is about 12877.1096135740. The cubic root of 165819952 is about 549.3876954454.

The spelling of 165819952 in words is "one hundred sixty-five million, eight hundred nineteen thousand, nine hundred fifty-two".