212068638784 has 56 divisors (see below), whose sum is σ = 442738919448. Its totient is φ = 100652175360.

The previous prime is 212068638781. The next prime is 212068638797. The reversal of 212068638784 is 487836860212.

It can be written as a sum of positive squares in 4 ways, for example, as 321413184 + 211747225600 = 17928^2 + 460160^2 .

It is not an unprimeable number, because it can be changed into a prime (212068638781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 995059 + ... + 1189234.

It is an arithmetic number, because the mean of its divisors is an integer number (7906052133).

Almost surely, 2^212068638784 is an apocalyptic number.

It is an amenable number.

212068638784 is an abundant number, since it is smaller than the sum of its proper divisors (230670280664).

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

212068638784 is a wasteful number, since it uses less digits than its factorization.

212068638784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2184383 (or 2184373 counting only the distinct ones).

The product of its (nonzero) digits is 6193152, while the sum is 55.

The spelling of 212068638784 in words is "two hundred twelve billion, sixty-eight million, six hundred thirty-eight thousand, seven hundred eighty-four".