8819145640 has 64 divisors (see below), whose sum is σ = 20911608000. Its totient is φ = 3338127360.

The previous prime is 8819145617. The next prime is 8819145677. The reversal of 8819145640 is 465419188.

8819145640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 699795 + ... + 712285.

It is an arithmetic number, because the mean of its divisors is an integer number (326743875).

Almost surely, 2^8819145640 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 8819145640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10455804000).

8819145640 is an abundant number, since it is smaller than the sum of its proper divisors (12092462360).

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

8819145640 is a wasteful number, since it uses less digits than its factorization.

8819145640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13450 (or 13446 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 46.

The square root of 8819145640 is about 93910.3063566508. The cubic root of 8819145640 is about 2066.0563936317.

The spelling of 8819145640 in words is "eight billion, eight hundred nineteen million, one hundred forty-five thousand, six hundred forty".