85236121056 has 96 divisors (see below), whose sum is σ = 225535726080. Its totient is φ = 28184961024.

The previous prime is 85236121051. The next prime is 85236121057. The reversal of 85236121056 is 65012163258.

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

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85236121051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28194361 + ... + 28197383.

It is an arithmetic number, because the mean of its divisors is an integer number (2349330480).

Almost surely, 2^85236121056 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 85236121056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112767863040).

85236121056 is an abundant number, since it is smaller than the sum of its proper divisors (140299605024).

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

85236121056 is a wasteful number, since it uses less digits than its factorization.

85236121056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5288 (or 5280 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 39.

The spelling of 85236121056 in words is "eighty-five billion, two hundred thirty-six million, one hundred twenty-one thousand, fifty-six".