212828956668 has 144 divisors (see below), whose sum is σ = 562708997760. Its totient is φ = 67756735872.

The previous prime is 212828956661. The next prime is 212828956679. The reversal of 212828956668 is 866659828212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212828956661) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 69391671 + ... + 69394737.

Almost surely, 2^212828956668 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 212828956668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (281354498880).

212828956668 is an abundant number, since it is smaller than the sum of its proper divisors (349880041092).

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

212828956668 is a wasteful number, since it uses less digits than its factorization.

212828956668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4056 (or 4051 counting only the distinct ones).

The product of its digits is 39813120, while the sum is 63.

The spelling of 212828956668 in words is "two hundred twelve billion, eight hundred twenty-eight million, nine hundred fifty-six thousand, six hundred sixty-eight".