216312428836 has 81 divisors (see below), whose sum is σ = 445404665979. Its totient is φ = 91653284016.

The previous prime is 216312428833. The next prime is 216312428887. The reversal of 216312428836 is 638824213612.

The square root of 216312428836 is 465094.

It is a perfect power (a square), and thus also a powerful number.

216312428836 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (216312428831) 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 26 ways as a sum of consecutive naturals, for example, 905072805 + ... + 905073043.

Almost surely, 2^216312428836 is an apocalyptic number.

216312428836 is the 465094-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216312428836

216312428836 is an abundant number, since it is smaller than the sum of its proper divisors (229092237143).

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

216312428836 is an equidigital number, since it uses as much as digits as its factorization.

216312428836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 774 (or 387 counting only the distinct ones).

The product of its digits is 663552, while the sum is 46.

The spelling of 216312428836 in words is "two hundred sixteen billion, three hundred twelve million, four hundred twenty-eight thousand, eight hundred thirty-six".