2118694161 has 8 divisors (see below), whose sum is σ = 2973605920. Its totient is φ = 1338122592.

The previous prime is 2118694159. The next prime is 2118694169. The reversal of 2118694161 is 1614968112.

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

It is not a de Polignac number, because 2118694161 - 2¹ = 2118694159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2118694169) 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, 18584980 + ... + 18585093.

It is an arithmetic number, because the mean of its divisors is an integer number (371700740).

Almost surely, 2^2118694161 is an apocalyptic number.

It is an amenable number.

2118694161 is a deficient number, since it is larger than the sum of its proper divisors (854911759).

2118694161 is a wasteful number, since it uses less digits than its factorization.

2118694161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37170095.

The product of its digits is 20736, while the sum is 39.

The square root of 2118694161 is about 46029.2750431723. The cubic root of 2118694161 is about 1284.3678421988.

The spelling of 2118694161 in words is "two billion, one hundred eighteen million, six hundred ninety-four thousand, one hundred sixty-one".