8555156064 has 384 divisors, whose sum is σ = 30908666880. Its totient is φ = 2241810432.

The previous prime is 8555156047. The next prime is 8555156069. The reversal of 8555156064 is 4606515558.

8555156064 is a `hidden beast` number, since 85 + 5 + 5 + 1 + 560 + 6 + 4 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8555156069) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 18319159 + ... + 18319625.

It is an arithmetic number, because the mean of its divisors is an integer number (80491320).

Almost surely, 2^8555156064 is an apocalyptic number.

8555156064 is a gapful number since it is divisible by the number (84) 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 8555156064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15454333440).

8555156064 is an abundant number, since it is smaller than the sum of its proper divisors (22353510816).

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

8555156064 is a wasteful number, since it uses less digits than its factorization.

8555156064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 739 (or 725 counting only the distinct ones).

The product of its (nonzero) digits is 720000, while the sum is 45.

The square root of 8555156064 is about 92494.0866434174. The cubic root of 8555156064 is about 2045.2323123278.

The spelling of 8555156064 in words is "eight billion, five hundred fifty-five million, one hundred fifty-six thousand, sixty-four".