216528237050385 has 64 divisors (see below), whose sum is σ = 385152918829056. Its totient is φ = 103153749350400.

The previous prime is 216528237050347. The next prime is 216528237050413. The reversal of 216528237050385 is 583050732825612.

It is a happy number.

It is not a de Polignac number, because 216528237050385 - 2¹⁰ = 216528237049361 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 101913015 + ... + 104015955.

It is an arithmetic number, because the mean of its divisors is an integer number (6018014356704).

Almost surely, 2^{216528237050385} is an apocalyptic number.

It is an amenable number.

216528237050385 is a deficient number, since it is larger than the sum of its proper divisors (168624681778671).

216528237050385 is a wasteful number, since it uses less digits than its factorization.

216528237050385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2120026.

The product of its (nonzero) digits is 24192000, while the sum is 57.

Adding to 216528237050385 its reverse (583050732825612), we get a palindrome (799578969875997).

The spelling of 216528237050385 in words is "two hundred sixteen trillion, five hundred twenty-eight billion, two hundred thirty-seven million, fifty thousand, three hundred eighty-five".