855944438706 has 256 divisors, whose sum is σ = 2264371200000. Its totient is φ = 234524160000.

The previous prime is 855944438683. The next prime is 855944438743. The reversal of 855944438706 is 607834449558.

855944438706 is a `hidden beast` number, since 8 + 5 + 594 + 4 + 4 + 38 + 7 + 0 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 685303170 + ... + 685304418.

It is an arithmetic number, because the mean of its divisors is an integer number (8845200000).

Almost surely, 2^855944438706 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 855944438706, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1132185600000).

855944438706 is an abundant number, since it is smaller than the sum of its proper divisors (1408426761294).

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

855944438706 is a wasteful number, since it uses less digits than its factorization.

855944438706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1782 (or 1776 counting only the distinct ones).

The product of its (nonzero) digits is 116121600, while the sum is 63.

The spelling of 855944438706 in words is "eight hundred fifty-five billion, nine hundred forty-four million, four hundred thirty-eight thousand, seven hundred six".