216687759889 has 8 divisors (see below), whose sum is σ = 229456990080. Its totient is φ = 203921073216.

The previous prime is 216687759863. The next prime is 216687759929. The reversal of 216687759889 is 988957786612.

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

It is not a de Polignac number, because 216687759889 - 2²⁵ = 216654205457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216687759829) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 459069 + ... + 802570.

It is an arithmetic number, because the mean of its divisors is an integer number (28682123760).

Almost surely, 2^216687759889 is an apocalyptic number.

It is an amenable number.

216687759889 is a deficient number, since it is larger than the sum of its proper divisors (12769230191).

216687759889 is a wasteful number, since it uses less digits than its factorization.

216687759889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1271759.

The product of its digits is 731566080, while the sum is 76.

The spelling of 216687759889 in words is "two hundred sixteen billion, six hundred eighty-seven million, seven hundred fifty-nine thousand, eight hundred eighty-nine".