210868541856 has 288 divisors, whose sum is σ = 716418743040. Its totient is φ = 57523986432.

The previous prime is 210868541809. The next prime is 210868541861. The reversal of 210868541856 is 658145868012.

210868541856 is a `hidden beast` number, since 2 + 10 + 8 + 6 + 8 + 541 + 85 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (288).

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 47 ways as a sum of consecutive naturals, for example, 27492390 + ... + 27500058.

It is an arithmetic number, because the mean of its divisors is an integer number (2487565080).

Almost surely, 2^210868541856 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 210868541856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (358209371520).

210868541856 is an abundant number, since it is smaller than the sum of its proper divisors (505550201184).

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

210868541856 is a wasteful number, since it uses less digits than its factorization.

210868541856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8308 (or 8297 counting only the distinct ones).

The product of its (nonzero) digits is 3686400, while the sum is 54.

The spelling of 210868541856 in words is "two hundred ten billion, eight hundred sixty-eight million, five hundred forty-one thousand, eight hundred fifty-six".