85997525944 has 64 divisors (see below), whose sum is σ = 185313744000. Its totient is φ = 37002107520.

The previous prime is 85997525917. The next prime is 85997525947. The reversal of 85997525944 is 44952579958.

It is a super-2 number, since 2×85997525944² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 85997525944.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85997525947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2084622 + ... + 2125474.

It is an arithmetic number, because the mean of its divisors is an integer number (2895527250).

Almost surely, 2^85997525944 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 85997525944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92656872000).

85997525944 is an abundant number, since it is smaller than the sum of its proper divisors (99316218056).

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

85997525944 is a wasteful number, since it uses less digits than its factorization.

85997525944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42148 (or 42144 counting only the distinct ones).

The product of its digits is 163296000, while the sum is 67.

The spelling of 85997525944 in words is "eighty-five billion, nine hundred ninety-seven million, five hundred twenty-five thousand, nine hundred forty-four".