8421371712 has 560 divisors, whose sum is σ = 28914547200. Its totient is φ = 2403717120.

The previous prime is 8421371689. The next prime is 8421371747. The reversal of 8421371712 is 2171731248.

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 polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 60585339 + ... + 60585477.

It is an arithmetic number, because the mean of its divisors is an integer number (51633120).

Almost surely, 2^8421371712 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 8421371712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14457273600).

8421371712 is an abundant number, since it is smaller than the sum of its proper divisors (20493175488).

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

8421371712 is a wasteful number, since it uses less digits than its factorization.

8421371712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236 (or 217 counting only the distinct ones).

The product of its digits is 18816, while the sum is 36.

The square root of 8421371712 is about 91768.0320808941. The cubic root of 8421371712 is about 2034.5152322030.

The spelling of 8421371712 in words is "eight billion, four hundred twenty-one million, three hundred seventy-one thousand, seven hundred twelve".