85057238528 has 80 divisors (see below), whose sum is σ = 175643043840. Its totient is φ = 41106892800.

The previous prime is 85057238509. The next prime is 85057238537. The reversal of 85057238528 is 82583275058.

It is a self number, because there is not a number n which added to its sum of digits gives 85057238528.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15408953 + ... + 15414471.

It is an arithmetic number, because the mean of its divisors is an integer number (2195538048).

Almost surely, 2^85057238528 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 85057238528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87821521920).

85057238528 is an abundant number, since it is smaller than the sum of its proper divisors (90585805312).

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

85057238528 is an equidigital number, since it uses as much as digits as its factorization.

85057238528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6539 (or 6523 counting only the distinct ones).

The product of its (nonzero) digits is 5376000, while the sum is 53.

The spelling of 85057238528 in words is "eighty-five billion, fifty-seven million, two hundred thirty-eight thousand, five hundred twenty-eight".