215882185181568 has 512 divisors, whose sum is σ = 640704315018240. Its totient is φ = 64057356582912.

The previous prime is 215882185181561. The next prime is 215882185181573. The reversal of 215882185181568 is 865181581288512.

It is a Harshad number since it is a multiple of its sum of digits (69).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215882185181561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4821251596 + ... + 4821296372.

It is an arithmetic number, because the mean of its divisors is an integer number (1251375615270).

Almost surely, 2^{215882185181568} 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 215882185181568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (320352157509120).

215882185181568 is an abundant number, since it is smaller than the sum of its proper divisors (424822129836672).

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

215882185181568 is a wasteful number, since it uses less digits than its factorization.

215882185181568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45194 (or 45182 counting only the distinct ones).

The product of its digits is 98304000, while the sum is 69.

The spelling of 215882185181568 in words is "two hundred fifteen trillion, eight hundred eighty-two billion, one hundred eighty-five million, one hundred eighty-one thousand, five hundred sixty-eight".