85558512 has 80 divisors (see below), whose sum is σ = 245762048. Its totient is φ = 25470720.

The previous prime is 85558511. The next prime is 85558523. The reversal of 85558512 is 21585558.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85558511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17133 + ... + 21555.

Almost surely, 2^85558512 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 85558512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122881024).

85558512 is an abundant number, since it is smaller than the sum of its proper divisors (160203536).

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

85558512 is a wasteful number, since it uses less digits than its factorization.

85558512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4478 (or 4472 counting only the distinct ones).

The product of its digits is 80000, while the sum is 39.

The square root of 85558512 is about 9249.7844299205. The cubic root of 85558512 is about 440.6438782516.

The spelling of 85558512 in words is "eighty-five million, five hundred fifty-eight thousand, five hundred twelve".