8220869644240 has 160 divisors (see below), whose sum is σ = 21042901560960. Its totient is φ = 2986639631360.

The previous prime is 8220869644223. The next prime is 8220869644249. The reversal of 8220869644240 is 424469680228.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8220869644249) 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, 116773371 + ... + 116843749.

It is an arithmetic number, because the mean of its divisors is an integer number (131518134756).

Almost surely, 2^{8220869644240} is an apocalyptic number.

8220869644240 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 8220869644240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10521450780480).

8220869644240 is an abundant number, since it is smaller than the sum of its proper divisors (12822031916720).

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

8220869644240 is a wasteful number, since it uses less digits than its factorization.

8220869644240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71522 (or 71494 counting only the distinct ones).

The product of its (nonzero) digits is 10616832, while the sum is 55.

The spelling of 8220869644240 in words is "eight trillion, two hundred twenty billion, eight hundred sixty-nine million, six hundred forty-four thousand, two hundred forty".