216571166580 has 48 divisors (see below), whose sum is σ = 608336697024. Its totient is φ = 57567793920.

The previous prime is 216571166549. The next prime is 216571166587. The reversal of 216571166580 is 85661175612.

216571166580 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216571166587) 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, 5747226 + ... + 5784785.

It is an arithmetic number, because the mean of its divisors is an integer number (12673681188).

Almost surely, 2^216571166580 is an apocalyptic number.

216571166580 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216571166580 is an abundant number, since it is smaller than the sum of its proper divisors (391765530444).

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

216571166580 is a wasteful number, since it uses less digits than its factorization.

216571166580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11532336 (or 11532334 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 48.

The spelling of 216571166580 in words is "two hundred sixteen billion, five hundred seventy-one million, one hundred sixty-six thousand, five hundred eighty".