8281721060 has 24 divisors (see below), whose sum is σ = 17492151096. Its totient is φ = 3293538560.

The previous prime is 8281721047. The next prime is 8281721087. The reversal of 8281721060 is 601271828.

It can be written as a sum of positive squares in 4 ways, for example, as 1017227236 + 7264493824 = 31894^2 + 85232^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 8281721060.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1193321 + ... + 1200240.

It is an arithmetic number, because the mean of its divisors is an integer number (728839629).

Almost surely, 2^8281721060 is an apocalyptic number.

It is an amenable number.

8281721060 is an abundant number, since it is smaller than the sum of its proper divisors (9210430036).

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

8281721060 is a wasteful number, since it uses less digits than its factorization.

8281721060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2393743 (or 2393741 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 35.

The square root of 8281721060 is about 91003.9617818917. The cubic root of 8281721060 is about 2023.2064440134.

Adding to 8281721060 its reverse (601271828), we get a palindrome (8882992888).

The spelling of 8281721060 in words is "eight billion, two hundred eighty-one million, seven hundred twenty-one thousand, sixty".