8417821768 has 16 divisors (see below), whose sum is σ = 15802606080. Its totient is φ = 4203793488.

The previous prime is 8417821751. The next prime is 8417821829. The reversal of 8417821768 is 8671287148.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 632680 + ... + 645847.

It is an arithmetic number, because the mean of its divisors is an integer number (987662880).

Almost surely, 2^8417821768 is an apocalyptic number.

It is an amenable number.

8417821768 is a deficient number, since it is larger than the sum of its proper divisors (7384784312).

8417821768 is a wasteful number, since it uses less digits than its factorization.

8417821768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1279356 (or 1279352 counting only the distinct ones).

The product of its digits is 1204224, while the sum is 52.

The square root of 8417821768 is about 91748.6880996126. The cubic root of 8417821768 is about 2034.2293155903.

The spelling of 8417821768 in words is "eight billion, four hundred seventeen million, eight hundred twenty-one thousand, seven hundred sixty-eight".