84171402528 has 96 divisors (see below), whose sum is σ = 222291216000. Its totient is φ = 27887118336.

The previous prime is 84171402421. The next prime is 84171402551. The reversal of 84171402528 is 82520417148.

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

It is a self number, because there is not a number n which added to its sum of digits gives 84171402528.

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, 26228188 + ... + 26231396.

It is an arithmetic number, because the mean of its divisors is an integer number (2315533500).

Almost surely, 2^84171402528 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 84171402528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111145608000).

84171402528 is an abundant number, since it is smaller than the sum of its proper divisors (138119813472).

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

84171402528 is a wasteful number, since it uses less digits than its factorization.

84171402528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4794 (or 4786 counting only the distinct ones).

The product of its (nonzero) digits is 143360, while the sum is 42.

The spelling of 84171402528 in words is "eighty-four billion, one hundred seventy-one million, four hundred two thousand, five hundred twenty-eight".