8555616 has 72 divisors (see below), whose sum is σ = 24779664. Its totient is φ = 2799360.

The previous prime is 8555611. The next prime is 8555623. The reversal of 8555616 is 6165558.

It is a tau number, because it is divible by the number of its divisors (72).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8555611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17325 + ... + 17811.

It is an arithmetic number, because the mean of its divisors is an integer number (344162).

Almost surely, 2^8555616 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 8555616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12389832).

8555616 is an abundant number, since it is smaller than the sum of its proper divisors (16224048).

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

8555616 is a wasteful number, since it uses less digits than its factorization.

8555616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 564 (or 553 counting only the distinct ones).

The product of its digits is 36000, while the sum is 36.

The square root of 8555616 is about 2924.9984615381. The cubic root of 8555616 is about 204.5268963095.

The spelling of 8555616 in words is "eight million, five hundred fifty-five thousand, six hundred sixteen".