165093504489 has 81 divisors (see below), whose sum is σ = 262778818341. Its totient is φ = 99856465920.

The previous prime is 165093504451. The next prime is 165093504503. The reversal of 165093504489 is 984405390561.

The square root of 165093504489 is 406317.

It is a perfect power (a square), and thus also a powerful number.

165093504489 is a `hidden beast` number, since 1 + 6 + 5 + 0 + 93 + 504 + 48 + 9 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 110168894889 + 54924609600 = 331917^2 + 234360^2 .

It is not a de Polignac number, because 165093504489 - 2⁷ = 165093504361 is a prime.

It is a super-2 number, since 2×165093504489² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (165093504449) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 642387049 + ... + 642387305.

Almost surely, 2^165093504489 is an apocalyptic number.

165093504489 is the 406317-th square number.

165093504489 is the 203159-th centered octagonal number.

It is an amenable number.

165093504489 is a deficient number, since it is larger than the sum of its proper divisors (97685313852).

165093504489 is an equidigital number, since it uses as much as digits as its factorization.

165093504489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 616 (or 308 counting only the distinct ones).

The product of its (nonzero) digits is 4665600, while the sum is 54.

The spelling of 165093504489 in words is "one hundred sixty-five billion, ninety-three million, five hundred four thousand, four hundred eighty-nine".