216544067916880 has 80 divisors (see below), whose sum is σ = 568173620275200. Its totient is φ = 76028011297280.

The previous prime is 216544067916863. The next prime is 216544067916887. The reversal of 216544067916880 is 88619760445612.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216544067916887) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4242609040 + ... + 4242660079.

It is an arithmetic number, because the mean of its divisors is an integer number (7102170253440).

Almost surely, 2^{216544067916880} is an apocalyptic number.

216544067916880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216544067916880 is an abundant number, since it is smaller than the sum of its proper divisors (351629552358320).

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

216544067916880 is a wasteful number, since it uses less digits than its factorization.

216544067916880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8485269172 (or 8485269166 counting only the distinct ones).

The product of its (nonzero) digits is 139345920, while the sum is 67.

The spelling of 216544067916880 in words is "two hundred sixteen trillion, five hundred forty-four billion, sixty-seven million, nine hundred sixteen thousand, eight hundred eighty".