8555504040 has 128 divisors (see below), whose sum is σ = 28541116800. Its totient is φ = 2279646720.

The previous prime is 8555504039. The next prime is 8555504057. The reversal of 8555504040 is 404055558.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 8555503986 and 8555504004.

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 31 ways as a sum of consecutive naturals, for example, 1856379 + ... + 1860981.

It is an arithmetic number, because the mean of its divisors is an integer number (222977475).

Almost surely, 2^8555504040 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 8555504040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14270558400).

8555504040 is an abundant number, since it is smaller than the sum of its proper divisors (19985612760).

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

8555504040 is a wasteful number, since it uses less digits than its factorization.

8555504040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6344 (or 6334 counting only the distinct ones).

The product of its (nonzero) digits is 80000, while the sum is 36.

The square root of 8555504040 is about 92495.9676958947. The cubic root of 8555504040 is about 2045.2600414970.

Adding to 8555504040 its reverse (404055558), we get a palindrome (8959559598).

The spelling of 8555504040 in words is "eight billion, five hundred fifty-five million, five hundred four thousand, forty".