2117156689 has 8 divisors (see below), whose sum is σ = 2174290560. Its totient is φ = 2060526576.

The previous prime is 2117156663. The next prime is 2117156747. The reversal of 2117156689 is 9866517112.

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 2117156689 - 2¹³ = 2117148497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2117156609) 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, 117414 + ... + 134239.

It is an arithmetic number, because the mean of its divisors is an integer number (271786320).

Almost surely, 2^2117156689 is an apocalyptic number.

It is an amenable number.

2117156689 is a deficient number, since it is larger than the sum of its proper divisors (57133871).

2117156689 is a wasteful number, since it uses less digits than its factorization.

2117156689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251879.

The product of its digits is 181440, while the sum is 46.

The square root of 2117156689 is about 46012.5709888070. The cubic root of 2117156689 is about 1284.0570914419.

The spelling of 2117156689 in words is "two billion, one hundred seventeen million, one hundred fifty-six thousand, six hundred eighty-nine".