165435321412 has 6 divisors (see below), whose sum is σ = 289511812478. Its totient is φ = 82717660704.

The previous prime is 165435321391. The next prime is 165435321509. The reversal of 165435321412 is 214123534561.

It can be written as a sum of positive squares in only one way, i.e., 130685142016 + 34750179396 = 361504^2 + 186414^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20679415173 + ... + 20679415180.

Almost surely, 2^165435321412 is an apocalyptic number.

It is an amenable number.

165435321412 is a deficient number, since it is larger than the sum of its proper divisors (124076491066).

165435321412 is a wasteful number, since it uses less digits than its factorization.

165435321412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41358830357 (or 41358830355 counting only the distinct ones).

The product of its digits is 86400, while the sum is 37.

Adding to 165435321412 its reverse (214123534561), we get a palindrome (379558855973).

The spelling of 165435321412 in words is "one hundred sixty-five billion, four hundred thirty-five million, three hundred twenty-one thousand, four hundred twelve".