161605115051606 has 8 divisors (see below), whose sum is σ = 242408132546184. Its totient is φ = 80802404202880.

The previous prime is 161605115051599. The next prime is 161605115051623. The reversal of 161605115051606 is 606150511506161.

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

It is a super-2 number, since 2×161605115051606² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75339380 + ... + 77454711.

It is an arithmetic number, because the mean of its divisors is an integer number (30301016568273).

Almost surely, 2^{161605115051606} is an apocalyptic number.

161605115051606 is a deficient number, since it is larger than the sum of its proper divisors (80803017494578).

161605115051606 is a wasteful number, since it uses less digits than its factorization.

161605115051606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153322926.

The product of its (nonzero) digits is 162000, while the sum is 44.

Adding to 161605115051606 its reverse (606150511506161), we get a palindrome (767755626557767).

The spelling of 161605115051606 in words is "one hundred sixty-one trillion, six hundred five billion, one hundred fifteen million, fifty-one thousand, six hundred six".