2161331533606 has 8 divisors (see below), whose sum is σ = 3705139771920. Its totient is φ = 926284942968.

The previous prime is 2161331533549. The next prime is 2161331533609. The reversal of 2161331533606 is 6063351331612.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2161331533609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77190411901 + ... + 77190411928.

It is an arithmetic number, because the mean of its divisors is an integer number (463142471490).

Almost surely, 2^{2161331533606} is an apocalyptic number.

2161331533606 is a deficient number, since it is larger than the sum of its proper divisors (1543808238314).

2161331533606 is a wasteful number, since it uses less digits than its factorization.

2161331533606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154380823838.

The product of its (nonzero) digits is 174960, while the sum is 40.

The spelling of 2161331533606 in words is "two trillion, one hundred sixty-one billion, three hundred thirty-one million, five hundred thirty-three thousand, six hundred six".