216763555536 has 120 divisors (see below), whose sum is σ = 665483700960. Its totient is φ = 65318880000.

The previous prime is 216763555531. The next prime is 216763555543. The reversal of 216763555536 is 635555367612.

It is a happy number.

216763555536 is a `hidden beast` number, since 2 + 1 + 6 + 76 + 35 + 5 + 5 + 536 = 666.

216763555536 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 not an unprimeable number, because it can be changed into a prime (216763555531) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 98715 + ... + 665786.

It is an arithmetic number, because the mean of its divisors is an integer number (5545697508).

Almost surely, 2^216763555536 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216763555536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (332741850480).

216763555536 is an abundant number, since it is smaller than the sum of its proper divisors (448720145424).

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

216763555536 is a wasteful number, since it uses less digits than its factorization.

216763555536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 764705 (or 764696 counting only the distinct ones).

The product of its digits is 17010000, while the sum is 54.

The spelling of 216763555536 in words is "two hundred sixteen billion, seven hundred sixty-three million, five hundred fifty-five thousand, five hundred thirty-six".