2115616161 has 8 divisors (see below), whose sum is σ = 2969285920. Its totient is φ = 1336178592.

The previous prime is 2115616157. The next prime is 2115616183. The reversal of 2115616161 is 1616165112.

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

It is not a de Polignac number, because 2115616161 - 2² = 2115616157 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2115614161) 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, 18557980 + ... + 18558093.

It is an arithmetic number, because the mean of its divisors is an integer number (371160740).

Almost surely, 2^2115616161 is an apocalyptic number.

It is an amenable number.

2115616161 is a deficient number, since it is larger than the sum of its proper divisors (853669759).

2115616161 is a wasteful number, since it uses less digits than its factorization.

2115616161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37116095.

The product of its digits is 2160, while the sum is 30.

The square root of 2115616161 is about 45995.8276477334. The cubic root of 2115616161 is about 1283.7455720827.

The spelling of 2115616161 in words is "two billion, one hundred fifteen million, six hundred sixteen thousand, one hundred sixty-one".