8421475216 has 80 divisors (see below), whose sum is σ = 20358875520. Its totient is φ = 3278499840.

The previous prime is 8421475211. The next prime is 8421475219. The reversal of 8421475216 is 6125741248.

It is not an unprimeable number, because it can be changed into a prime (8421475211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2483250 + ... + 2486638.

It is an arithmetic number, because the mean of its divisors is an integer number (254485944).

Almost surely, 2^8421475216 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 8421475216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10179437760).

8421475216 is an abundant number, since it is smaller than the sum of its proper divisors (11937400304).

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

8421475216 is a wasteful number, since it uses less digits than its factorization.

8421475216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5432 (or 5426 counting only the distinct ones).

The product of its digits is 107520, while the sum is 40.

The square root of 8421475216 is about 91768.5960228225. The cubic root of 8421475216 is about 2034.5235673298.

The spelling of 8421475216 in words is "eight billion, four hundred twenty-one million, four hundred seventy-five thousand, two hundred sixteen".