85647744000 has 2112 divisors, whose sum is σ = 409153704960. Its totient is φ = 16721510400.

The previous prime is 85647743959. The next prime is 85647744031. The reversal of 85647744000 is 44774658.

85647744000 is a `hidden beast` number, since 85 + 64 + 77 + 440 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 1991807979 + ... + 1991808021.

It is an arithmetic number, because the mean of its divisors is an integer number (193728080).

Almost surely, 2^85647744000 is an apocalyptic number.

85647744000 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 85647744000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (204576852480).

85647744000 is an abundant number, since it is smaller than the sum of its proper divisors (323505960960).

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

85647744000 is a wasteful number, since it uses less digits than its factorization.

85647744000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123 (or 92 counting only the distinct ones).

The product of its (nonzero) digits is 752640, while the sum is 45.

The spelling of 85647744000 in words is "eighty-five billion, six hundred forty-seven million, seven hundred forty-four thousand".