215917920000 has 720 divisors, whose sum is σ = 805589128960. Its totient is φ = 57024000000.

The previous prime is 215917919981. The next prime is 215917920073. The reversal of 215917920000 is 29719512.

215917920000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (720).

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 652319835 + ... + 652320165.

Almost surely, 2^215917920000 is an apocalyptic number.

215917920000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215917920000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (402794564480).

215917920000 is an abundant number, since it is smaller than the sum of its proper divisors (589671208960).

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

215917920000 is an equidigital number, since it uses as much as digits as its factorization.

215917920000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 527 (or 492 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 36.

The spelling of 215917920000 in words is "two hundred fifteen billion, nine hundred seventeen million, nine hundred twenty thousand".