216065371164 has 12 divisors (see below), whose sum is σ = 504152532744. Its totient is φ = 72021790384.

The previous prime is 216065371091. The next prime is 216065371177. The reversal of 216065371164 is 461173560612.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9002723787 + ... + 9002723810.

It is an arithmetic number, because the mean of its divisors is an integer number (42012711062).

Almost surely, 2^216065371164 is an apocalyptic number.

It is an amenable number.

216065371164 is an abundant number, since it is smaller than the sum of its proper divisors (288087161580).

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

216065371164 is a wasteful number, since it uses less digits than its factorization.

216065371164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18005447604 (or 18005447602 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 42.

The spelling of 216065371164 in words is "two hundred sixteen billion, sixty-five million, three hundred seventy-one thousand, one hundred sixty-four".