8539332640 has 96 divisors (see below), whose sum is σ = 21310672320. Its totient is φ = 3224577024.

The previous prime is 8539332623. The next prime is 8539332643. The reversal of 8539332640 is 462339358.

It is not an unprimeable number, because it can be changed into a prime (8539332643) 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, 885927 + ... + 895513.

It is an arithmetic number, because the mean of its divisors is an integer number (221986170).

Almost surely, 2^8539332640 is an apocalyptic number.

8539332640 is a gapful number since it is divisible by the number (80) 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 8539332640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10655336160).

8539332640 is an abundant number, since it is smaller than the sum of its proper divisors (12771339680).

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

8539332640 is a wasteful number, since it uses less digits than its factorization.

8539332640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9914 (or 9906 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 43.

The square root of 8539332640 is about 92408.5095648664. The cubic root of 8539332640 is about 2043.9705955842.

The spelling of 8539332640 in words is "eight billion, five hundred thirty-nine million, three hundred thirty-two thousand, six hundred forty".