216720520500 has 96 divisors (see below), whose sum is σ = 688462040448. Its totient is φ = 52538304000.

The previous prime is 216720520493. The next prime is 216720520531. The reversal of 216720520500 is 5025027612.

216720520500 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6550789 + ... + 6583788.

It is an arithmetic number, because the mean of its divisors is an integer number (7171479588).

Almost surely, 2^216720520500 is an apocalyptic number.

216720520500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216720520500 is an abundant number, since it is smaller than the sum of its proper divisors (471741519948).

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

216720520500 is a wasteful number, since it uses less digits than its factorization.

216720520500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13134610 (or 13134598 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 30.

The spelling of 216720520500 in words is "two hundred sixteen billion, seven hundred twenty million, five hundred twenty thousand, five hundred".