8821845585 has 144 divisors (see below), whose sum is σ = 18150350400. Its totient is φ = 3951666432.

The previous prime is 8821845551. The next prime is 8821845589. The reversal of 8821845585 is 5855481288.

8821845585 is a `hidden beast` number, since 8 + 8 + 2 + 1 + 84 + 558 + 5 = 666.

It is not a de Polignac number, because 8821845585 - 2¹⁴ = 8821829201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8821845589) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 32794831 + ... + 32795099.

It is an arithmetic number, because the mean of its divisors is an integer number (126044100).

Almost surely, 2^8821845585 is an apocalyptic number.

It is an amenable number.

8821845585 is an abundant number, since it is smaller than the sum of its proper divisors (9328504815).

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

8821845585 is a wasteful number, since it uses less digits than its factorization.

8821845585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540 (or 530 counting only the distinct ones).

The product of its digits is 4096000, while the sum is 54.

The square root of 8821845585 is about 93924.6803827407. The cubic root of 8821845585 is about 2066.2672103292.

The spelling of 8821845585 in words is "eight billion, eight hundred twenty-one million, eight hundred forty-five thousand, five hundred eighty-five".