165931660312 has 64 divisors (see below), whose sum is σ = 341435606400. Its totient is φ = 74973600000.

The previous prime is 165931660309. The next prime is 165931660319. The reversal of 165931660312 is 213066139561.

It is a happy number.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165931660319) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11500639 + ... + 11515057.

It is an arithmetic number, because the mean of its divisors is an integer number (5334931350).

Almost surely, 2^165931660312 is an apocalyptic number.

It is an amenable number.

165931660312 is an abundant number, since it is smaller than the sum of its proper divisors (175503946088).

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

165931660312 is a wasteful number, since it uses less digits than its factorization.

165931660312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15208 (or 15204 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 43.

Adding to 165931660312 its reverse (213066139561), we get a palindrome (378997799873).

The spelling of 165931660312 in words is "one hundred sixty-five billion, nine hundred thirty-one million, six hundred sixty thousand, three hundred twelve".