8231129964 has 72 divisors (see below), whose sum is σ = 21388283280. Its totient is φ = 2667123072.

The previous prime is 8231129941. The next prime is 8231129993. The reversal of 8231129964 is 4699211328.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1986607 + ... + 1990745.

It is an arithmetic number, because the mean of its divisors is an integer number (297059490).

Almost surely, 2^8231129964 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 8231129964, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10694141640).

8231129964 is an abundant number, since it is smaller than the sum of its proper divisors (13157153316).

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

8231129964 is a wasteful number, since it uses less digits than its factorization.

8231129964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5679 (or 5674 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 8231129964 is about 90725.5750271113. The cubic root of 8231129964 is about 2019.0782616244.

The spelling of 8231129964 in words is "eight billion, two hundred thirty-one million, one hundred twenty-nine thousand, nine hundred sixty-four".