165612343538 has 8 divisors (see below), whose sum is σ = 248449790700. Its totient is φ = 82795746640.

The previous prime is 165612343531. The next prime is 165612343579. The reversal of 165612343538 is 835343216561.

165612343538 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 157059238249 + 8553105289 = 396307^2 + 92483^2 .

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 165612343492 and 165612343501.

It is not an unprimeable number, because it can be changed into a prime (165612343531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5192693 + ... + 5224488.

Almost surely, 2^165612343538 is an apocalyptic number.

165612343538 is a deficient number, since it is larger than the sum of its proper divisors (82837447162).

165612343538 is a wasteful number, since it uses less digits than its factorization.

165612343538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10425132.

The product of its digits is 1555200, while the sum is 47.

The spelling of 165612343538 in words is "one hundred sixty-five billion, six hundred twelve million, three hundred forty-three thousand, five hundred thirty-eight".