2166989867584 has 28 divisors (see below), whose sum is σ = 4364301430384. Its totient is φ = 1067323365504.

The previous prime is 2166989867513. The next prime is 2166989867591. The reversal of 2166989867584 is 4857689896612.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 252676434 + ... + 252685009.

It is an arithmetic number, because the mean of its divisors is an integer number (155867908228).

Almost surely, 2^{2166989867584} is an apocalyptic number.

It is an amenable number.

2166989867584 is an abundant number, since it is smaller than the sum of its proper divisors (2197311562800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2166989867584 is an equidigital number, since it uses as much as digits as its factorization.

2166989867584 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505361522 (or 505361512 counting only the distinct ones).

The product of its digits is 2508226560, while the sum is 79.

The spelling of 2166989867584 in words is "two trillion, one hundred sixty-six billion, nine hundred eighty-nine million, eight hundred sixty-seven thousand, five hundred eighty-four".