8539161020 has 144 divisors (see below), whose sum is σ = 20368145952. Its totient is φ = 3002388480.

The previous prime is 8539161011. The next prime is 8539161031. The reversal of 8539161020 is 201619358.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5958224 + ... + 5959656.

It is an arithmetic number, because the mean of its divisors is an integer number (141445458).

Almost surely, 2^8539161020 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 8539161020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10184072976).

8539161020 is an abundant number, since it is smaller than the sum of its proper divisors (11828984932).

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

8539161020 is a wasteful number, since it uses less digits than its factorization.

8539161020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1552 (or 1537 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 8539161020 is about 92407.5809660658. The cubic root of 8539161020 is about 2043.9569025320.

The spelling of 8539161020 in words is "eight billion, five hundred thirty-nine million, one hundred sixty-one thousand, twenty".