8513212128 has 96 divisors (see below), whose sum is σ = 23686465824. Its totient is φ = 2668019712.

The previous prime is 8513212093. The next prime is 8513212139. The reversal of 8513212128 is 8212123158.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2016676 + ... + 2020892.

It is an arithmetic number, because the mean of its divisors is an integer number (246734019).

Almost surely, 2^8513212128 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 8513212128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11843232912).

8513212128 is an abundant number, since it is smaller than the sum of its proper divisors (15173253696).

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

8513212128 is a wasteful number, since it uses less digits than its factorization.

8513212128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5484 (or 5476 counting only the distinct ones).

The product of its digits is 7680, while the sum is 33.

The square root of 8513212128 is about 92267.0695752282. The cubic root of 8513212128 is about 2041.8844025818.

The spelling of 8513212128 in words is "eight billion, five hundred thirteen million, two hundred twelve thousand, one hundred twenty-eight".