8216443385 has 8 divisors (see below), whose sum is σ = 9955458240. Its totient is φ = 6509337264.

The previous prime is 8216443379. The next prime is 8216443399. The reversal of 8216443385 is 5833446128.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8216443385 - 2¹⁰ = 8216442361 is a prime.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 7976615 + ... + 7977644.

It is an arithmetic number, because the mean of its divisors is an integer number (1244432280).

Almost surely, 2^8216443385 is an apocalyptic number.

It is an amenable number.

8216443385 is a deficient number, since it is larger than the sum of its proper divisors (1739014855).

8216443385 is a wasteful number, since it uses less digits than its factorization.

8216443385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15954367.

The product of its digits is 552960, while the sum is 44.

The square root of 8216443385 is about 90644.5993151274. The cubic root of 8216443385 is about 2017.8766847416.

The spelling of 8216443385 in words is "eight billion, two hundred sixteen million, four hundred forty-three thousand, three hundred eighty-five".