165630752404 has 24 divisors (see below), whose sum is σ = 312168715880. Its totient is φ = 76440443904.

The previous prime is 165630752401. The next prime is 165630752489. The reversal of 165630752404 is 404257036561.

It can be written as a sum of positive squares in 4 ways, for example, as 49063136004 + 116567616400 = 221502^2 + 341420^2 .

It is a super-2 number, since 2×165630752404² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165630752401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 892492 + ... + 1061980.

Almost surely, 2^165630752404 is an apocalyptic number.

It is an amenable number.

165630752404 is a deficient number, since it is larger than the sum of its proper divisors (146537963476).

165630752404 is a wasteful number, since it uses less digits than its factorization.

165630752404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188299 (or 188297 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 43.

Adding to 165630752404 its reverse (404257036561), we get a palindrome (569887788965).

The spelling of 165630752404 in words is "one hundred sixty-five billion, six hundred thirty million, seven hundred fifty-two thousand, four hundred four".