216188275688420 has 96 divisors (see below), whose sum is σ = 519749817979392. Its totient is φ = 73993441471488.

The previous prime is 216188275688381. The next prime is 216188275688447. The reversal of 216188275688420 is 24886572881612.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 815035457 + ... + 815300663.

It is an arithmetic number, because the mean of its divisors is an integer number (5414060603952).

Almost surely, 2^{216188275688420} is an apocalyptic number.

216188275688420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216188275688420 is an abundant number, since it is smaller than the sum of its proper divisors (303561542290972).

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

216188275688420 is a wasteful number, since it uses less digits than its factorization.

216188275688420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275277 (or 275275 counting only the distinct ones).

The product of its (nonzero) digits is 165150720, while the sum is 68.

The spelling of 216188275688420 in words is "two hundred sixteen trillion, one hundred eighty-eight billion, two hundred seventy-five million, six hundred eighty-eight thousand, four hundred twenty".