8821918656 has 168 divisors, whose sum is σ = 26294486400. Its totient is φ = 2932630272.

The previous prime is 8821918649. The next prime is 8821918687. The reversal of 8821918656 is 6568191288.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9315175 + ... + 9316121.

It is an arithmetic number, because the mean of its divisors is an integer number (156514800).

Almost surely, 2^8821918656 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 8821918656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13147243200).

8821918656 is an abundant number, since it is smaller than the sum of its proper divisors (17472567744).

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

8821918656 is an equidigital number, since it uses as much as digits as its factorization.

8821918656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1573 (or 1551 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 54.

The square root of 8821918656 is about 93925.0693691519. The cubic root of 8821918656 is about 2066.2729152501.

The spelling of 8821918656 in words is "eight billion, eight hundred twenty-one million, nine hundred eighteen thousand, six hundred fifty-six".