206551213056 has 528 divisors, whose sum is σ = 639159603264. Its totient is φ = 66599387136.

The previous prime is 206551213039. The next prime is 206551213081. The reversal of 206551213056 is 650312155602.

206551213056 is a `hidden beast` number, since 2 + 0 + 6 + 5 + 512 + 130 + 5 + 6 = 666.

It is a super-3 number, since 3×206551213056³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 206551213056.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1507673020 + ... + 1507673156.

Almost surely, 2^206551213056 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 206551213056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (319579801632).

206551213056 is an abundant number, since it is smaller than the sum of its proper divisors (432608390208).

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

206551213056 is an equidigital number, since it uses as much as digits as its factorization.

206551213056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328 (or 298 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

Adding to 206551213056 its reverse (650312155602), we get a palindrome (856863368658).

The spelling of 206551213056 in words is "two hundred six billion, five hundred fifty-one million, two hundred thirteen thousand, fifty-six".