85531789836 has 192 divisors, whose sum is σ = 228614400000. Its totient is φ = 27645456384.

The previous prime is 85531789823. The next prime is 85531789843. The reversal of 85531789836 is 63898713558.

85531789836 is a `hidden beast` number, since 8 + 5 + 531 + 7 + 8 + 98 + 3 + 6 = 666.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 190493740 + ... + 190494188.

It is an arithmetic number, because the mean of its divisors is an integer number (1190700000).

Almost surely, 2^85531789836 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 85531789836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114307200000).

85531789836 is an abundant number, since it is smaller than the sum of its proper divisors (143082610164).

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

85531789836 is a wasteful number, since it uses less digits than its factorization.

85531789836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 893 (or 885 counting only the distinct ones).

The product of its digits is 43545600, while the sum is 63.

The spelling of 85531789836 in words is "eighty-five billion, five hundred thirty-one million, seven hundred eighty-nine thousand, eight hundred thirty-six".