8621717345280 has 1760 divisors, whose sum is σ = 37090751765760. Its totient is φ = 1891919462400.

The previous prime is 8621717345257. The next prime is 8621717345291. The reversal of 8621717345280 is 825437171268.

8621717345280 is a `hidden beast` number, since 8 + 6 + 2 + 1 + 7 + 17 + 345 + 280 = 666.

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 159 ways as a sum of consecutive naturals, for example, 1741406805 + ... + 1741411755.

It is an arithmetic number, because the mean of its divisors is an integer number (21074290776).

Almost surely, 2^{8621717345280} is an apocalyptic number.

8621717345280 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 8621717345280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18545375882880).

8621717345280 is an abundant number, since it is smaller than the sum of its proper divisors (28469034420480).

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

8621717345280 is a wasteful number, since it uses less digits than its factorization.

8621717345280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5037 (or 5010 counting only the distinct ones).

The product of its (nonzero) digits is 4515840, while the sum is 54.

The spelling of 8621717345280 in words is "eight trillion, six hundred twenty-one billion, seven hundred seventeen million, three hundred forty-five thousand, two hundred eighty".