216765474520 has 64 divisors (see below), whose sum is σ = 561785978880. Its totient is φ = 73734385536.

The previous prime is 216765474511. The next prime is 216765474551. The reversal of 216765474520 is 25474567612.

216765474520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 15 ways as a sum of consecutive naturals, for example, 3012324 + ... + 3083443.

It is an arithmetic number, because the mean of its divisors is an integer number (8777905920).

Almost surely, 2^216765474520 is an apocalyptic number.

216765474520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216765474520 is an abundant number, since it is smaller than the sum of its proper divisors (345020504360).

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

216765474520 is a wasteful number, since it uses less digits than its factorization.

216765474520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6095912 (or 6095908 counting only the distinct ones).

The product of its (nonzero) digits is 2822400, while the sum is 49.

The spelling of 216765474520 in words is "two hundred sixteen billion, seven hundred sixty-five million, four hundred seventy-four thousand, five hundred twenty".