165412434243365 has 8 divisors (see below), whose sum is σ = 198496256126328. Its totient is φ = 132329057371840.

The previous prime is 165412434243361. The next prime is 165412434243389. The reversal of 165412434243365 is 563342434214561.

It can be written as a sum of positive squares in 4 ways, for example, as 55299122850244 + 110113311393121 = 7436338^2 + 10493489^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 165412434243365 - 2² = 165412434243361 is a prime.

It is a super-2 number, since 2×165412434243365² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165412434243361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110434562 + ... + 111922371.

It is an arithmetic number, because the mean of its divisors is an integer number (24812032015791).

Almost surely, 2^{165412434243365} is an apocalyptic number.

It is an amenable number.

165412434243365 is a deficient number, since it is larger than the sum of its proper divisors (33083821882963).

165412434243365 is a wasteful number, since it uses less digits than its factorization.

165412434243365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222505719.

The product of its digits is 24883200, while the sum is 53.

The spelling of 165412434243365 in words is "one hundred sixty-five trillion, four hundred twelve billion, four hundred thirty-four million, two hundred forty-three thousand, three hundred sixty-five".