216528328223828 has 12 divisors (see below), whose sum is σ = 380550860120340. Its totient is φ = 107799511046592.

The previous prime is 216528328223797. The next prime is 216528328223843. The reversal of 216528328223828 is 828322823825612.

216528328223828 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 20757245344144 + 195771082879684 = 4556012^2 + 13991822^2 .

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, 116163265283 + ... + 116163267146.

It is an arithmetic number, because the mean of its divisors is an integer number (31712571676695).

Almost surely, 2^{216528328223828} is an apocalyptic number.

It is an amenable number.

216528328223828 is a deficient number, since it is larger than the sum of its proper divisors (164022531896512).

216528328223828 is a wasteful number, since it uses less digits than its factorization.

216528328223828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232326532666 (or 232326532664 counting only the distinct ones).

The product of its digits is 70778880, while the sum is 62.

The spelling of 216528328223828 in words is "two hundred sixteen trillion, five hundred twenty-eight billion, three hundred twenty-eight million, two hundred twenty-three thousand, eight hundred twenty-eight".