2161586983589 has 4 divisors (see below), whose sum is σ = 2358094891200. Its totient is φ = 1965079075980.

The previous prime is 2161586983561. The next prime is 2161586983609. The reversal of 2161586983589 is 9853896851612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2161586983589 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2161586983189) 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, 98253953789 + ... + 98253953810.

It is an arithmetic number, because the mean of its divisors is an integer number (589523722800).

Almost surely, 2^{2161586983589} is an apocalyptic number.

It is an amenable number.

2161586983589 is a deficient number, since it is larger than the sum of its proper divisors (196507907611).

2161586983589 is a wasteful number, since it uses less digits than its factorization.

2161586983589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196507907610.

The product of its digits is 223948800, while the sum is 71.

The spelling of 2161586983589 in words is "two trillion, one hundred sixty-one billion, five hundred eighty-six million, nine hundred eighty-three thousand, five hundred eighty-nine".