2161116662331 has 8 divisors (see below), whose sum is σ = 3143442417984. Its totient is φ = 1309767674120.

The previous prime is 2161116662329. The next prime is 2161116662357. The reversal of 2161116662331 is 1332666111612.

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

It is a cyclic number.

It is not a de Polignac number, because 2161116662331 - 2¹ = 2161116662329 is a prime.

It is a super-2 number, since 2×2161116662331² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2161116662331.

It is not an unprimeable number, because it can be changed into a prime (2161116662311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32744191821 + ... + 32744191886.

It is an arithmetic number, because the mean of its divisors is an integer number (392930302248).

Almost surely, 2^{2161116662331} is an apocalyptic number.

2161116662331 is a deficient number, since it is larger than the sum of its proper divisors (982325755653).

2161116662331 is a wasteful number, since it uses less digits than its factorization.

2161116662331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65488383721.

The product of its digits is 46656, while the sum is 39.

The spelling of 2161116662331 in words is "two trillion, one hundred sixty-one billion, one hundred sixteen million, six hundred sixty-two thousand, three hundred thirty-one".