216936797812 has 36 divisors (see below), whose sum is σ = 444844906884. Its totient is φ = 92294267520.

The previous prime is 216936797783. The next prime is 216936797827. The reversal of 216936797812 is 218797639612.

It can be written as a sum of positive squares in 2 ways, for example, as 87973932816 + 128962864996 = 296604^2 + 359114^2 .

It is a hoax number, since the sum of its digits (61) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4012639 + ... + 4066342.

It is an arithmetic number, because the mean of its divisors is an integer number (12356802969).

Almost surely, 2^216936797812 is an apocalyptic number.

It is an amenable number.

216936797812 is an abundant number, since it is smaller than the sum of its proper divisors (227908109072).

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

216936797812 is a wasteful number, since it uses less digits than its factorization.

216936797812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8079136 (or 8079127 counting only the distinct ones).

The product of its digits is 13716864, while the sum is 61.

The spelling of 216936797812 in words is "two hundred sixteen billion, nine hundred thirty-six million, seven hundred ninety-seven thousand, eight hundred twelve".