8820645767440 has 160 divisors (see below), whose sum is σ = 22871308142592. Its totient is φ = 3141656064000.

The previous prime is 8820645767377. The next prime is 8820645767449. The reversal of 8820645767440 is 447675460288.

It is not an unprimeable number, because it can be changed into a prime (8820645767449) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9586780 + ... + 10466500.

Almost surely, 2^{8820645767440} is an apocalyptic number.

8820645767440 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8820645767440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11435654071296).

8820645767440 is an abundant number, since it is smaller than the sum of its proper divisors (14050662375152).

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

8820645767440 is a wasteful number, since it uses less digits than its factorization.

8820645767440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 880089 (or 880083 counting only the distinct ones).

The product of its (nonzero) digits is 72253440, while the sum is 61.

The spelling of 8820645767440 in words is "eight trillion, eight hundred twenty billion, six hundred forty-five million, seven hundred sixty-seven thousand, four hundred forty".