215985966336 has 324 divisors, whose sum is σ = 738101365092. Its totient is φ = 60544253952.

The previous prime is 215985966299. The next prime is 215985966349. The reversal of 215985966336 is 633669589512.

215985966336 is a `hidden beast` number, since 2 + 1 + 5 + 9 + 8 + 596 + 6 + 3 + 36 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 92464646400 + 123521319936 = 304080^2 + 351456^2 .

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

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 35 ways as a sum of consecutive naturals, for example, 5965440 + ... + 6001536.

It is an arithmetic number, because the mean of its divisors is an integer number (2278090633).

Almost surely, 2^215985966336 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 215985966336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (369050682546).

215985966336 is an abundant number, since it is smaller than the sum of its proper divisors (522115398756).

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

215985966336 is a wasteful number, since it uses less digits than its factorization.

215985966336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36186 (or 36162 counting only the distinct ones).

The product of its digits is 62985600, while the sum is 63.

The spelling of 215985966336 in words is "two hundred fifteen billion, nine hundred eighty-five million, nine hundred sixty-six thousand, three hundred thirty-six".