8128325856 has 384 divisors, whose sum is σ = 27172454400. Its totient is φ = 2074152960.

The previous prime is 8128325851. The next prime is 8128325893. The reversal of 8128325856 is 6585238218.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8128325851) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 26135941 + ... + 26136251.

It is an arithmetic number, because the mean of its divisors is an integer number (70761600).

Almost surely, 2^8128325856 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 8128325856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13586227200).

8128325856 is an abundant number, since it is smaller than the sum of its proper divisors (19044128544).

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

8128325856 is a wasteful number, since it uses less digits than its factorization.

8128325856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462 (or 454 counting only the distinct ones).

The product of its digits is 921600, while the sum is 48.

The square root of 8128325856 is about 90157.2285288318. The cubic root of 8128325856 is about 2010.6371465911.

The spelling of 8128325856 in words is "eight billion, one hundred twenty-eight million, three hundred twenty-five thousand, eight hundred fifty-six".