8555785056 has 576 divisors, whose sum is σ = 31621943808. Its totient is φ = 2215600128.

The previous prime is 8555785009. The next prime is 8555785081. The reversal of 8555785056 is 6505875558.

It is a happy number.

8555785056 is a `hidden beast` number, since 8 + 5 + 557 + 85 + 0 + 5 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 8555784993 and 8555785011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 75714856 + ... + 75714968.

It is an arithmetic number, because the mean of its divisors is an integer number (54899208).

Almost surely, 2^8555785056 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 8555785056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15810971904).

8555785056 is an abundant number, since it is smaller than the sum of its proper divisors (23066158752).

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

8555785056 is a wasteful number, since it uses less digits than its factorization.

8555785056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265 (or 245 counting only the distinct ones).

The product of its (nonzero) digits is 8400000, while the sum is 54.

The square root of 8555785056 is about 92497.4867550465. The cubic root of 8555785056 is about 2045.2824342748.

The spelling of 8555785056 in words is "eight billion, five hundred fifty-five million, seven hundred eighty-five thousand, fifty-six".