85525728520528 has 80 divisors (see below), whose sum is σ = 174339750470400. Its totient is φ = 40585169891840.

The previous prime is 85525728520517. The next prime is 85525728520607. The reversal of 85525728520528 is 82502582752558.

It is a self number, because there is not a number n which added to its sum of digits gives 85525728520528.

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, 353330550 + ... + 353572522.

It is an arithmetic number, because the mean of its divisors is an integer number (2179246880880).

Almost surely, 2^{85525728520528} 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 85525728520528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87169875235200).

85525728520528 is an abundant number, since it is smaller than the sum of its proper divisors (88814021949872).

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

85525728520528 is a wasteful number, since it uses less digits than its factorization.

85525728520528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254980 (or 254974 counting only the distinct ones).

The product of its (nonzero) digits is 179200000, while the sum is 64.

The spelling of 85525728520528 in words is "eighty-five trillion, five hundred twenty-five billion, seven hundred twenty-eight million, five hundred twenty thousand, five hundred twenty-eight".