161133063506 has 8 divisors (see below), whose sum is σ = 242384297724. Its totient is φ = 80338297600.

The previous prime is 161133063463. The next prime is 161133063569. The reversal of 161133063506 is 605360331161.

It can be written as a sum of positive squares in 2 ways, for example, as 145530805225 + 15602258281 = 381485^2 + 124909^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114116195 + ... + 114117606.

Almost surely, 2^161133063506 is an apocalyptic number.

161133063506 is a deficient number, since it is larger than the sum of its proper divisors (81251234218).

161133063506 is a wasteful number, since it uses less digits than its factorization.

161133063506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228234156.

The product of its (nonzero) digits is 29160, while the sum is 35.

Adding to 161133063506 its reverse (605360331161), we get a palindrome (766493394667).

The spelling of 161133063506 in words is "one hundred sixty-one billion, one hundred thirty-three million, sixty-three thousand, five hundred six".