165730651224 has 72 divisors (see below), whose sum is σ = 433243967940. Its totient is φ = 52827031488.

The previous prime is 165730651223. The next prime is 165730651231. The reversal of 165730651224 is 422156037561.

It is a super-2 number, since 2×165730651224² (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 (165730651223) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 45868842 + ... + 45872454.

Almost surely, 2^165730651224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 165730651224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (216621983970).

165730651224 is an abundant number, since it is smaller than the sum of its proper divisors (267513316716).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165730651224 is an frugal number, since it uses more digits than its factorization.

165730651224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7281 (or 3641 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 42.

Adding to 165730651224 its reverse (422156037561), we get a palindrome (587886688785).

The spelling of 165730651224 in words is "one hundred sixty-five billion, seven hundred thirty million, six hundred fifty-one thousand, two hundred twenty-four".