8168643848 has 8 divisors (see below), whose sum is σ = 15316207230. Its totient is φ = 4084321920.

The previous prime is 8168643841. The next prime is 8168643877. The reversal of 8168643848 is 8483468618.

It can be written as a sum of positive squares in only one way, i.e., 8153728804 + 14915044 = 90298^2 + 3862^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 8168643793 and 8168643802.

It is not an unprimeable number, because it can be changed into a prime (8168643841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510540233 + ... + 510540248.

Almost surely, 2^8168643848 is an apocalyptic number.

It is an amenable number.

8168643848 is a deficient number, since it is larger than the sum of its proper divisors (7147563382).

8168643848 is a wasteful number, since it uses less digits than its factorization.

8168643848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1021080487 (or 1021080483 counting only the distinct ones).

The product of its digits is 7077888, while the sum is 56.

The square root of 8168643848 is about 90380.5501642914. The cubic root of 8168643848 is about 2013.9560419274.

The spelling of 8168643848 in words is "eight billion, one hundred sixty-eight million, six hundred forty-three thousand, eight hundred forty-eight".