855189786000 has 320 divisors, whose sum is σ = 3041596396800. Its totient is φ = 204987904000.

The previous prime is 855189785999. The next prime is 855189786047. The reversal of 855189786000 is 687981558.

It is a happy number.

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, 5801206 + ... + 5946794.

It is an arithmetic number, because the mean of its divisors is an integer number (9504988740).

Almost surely, 2^855189786000 is an apocalyptic number.

855189786000 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 855189786000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1520798198400).

855189786000 is an abundant number, since it is smaller than the sum of its proper divisors (2186406610800).

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

855189786000 is a wasteful number, since it uses less digits than its factorization.

855189786000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145715 (or 145699 counting only the distinct ones).

The product of its (nonzero) digits is 4838400, while the sum is 57.

The spelling of 855189786000 in words is "eight hundred fifty-five billion, one hundred eighty-nine million, seven hundred eighty-six thousand".