8159463568 has 20 divisors (see below), whose sum is σ = 15965488188. Its totient is φ = 4039337600.

The previous prime is 8159463563. The next prime is 8159463643. The reversal of 8159463568 is 8653649518.

It can be written as a sum of positive squares in 2 ways, for example, as 4541681664 + 3617781904 = 67392^2 + 60148^2 .

It is not an unprimeable number, because it can be changed into a prime (8159463563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2522971 + ... + 2526202.

Almost surely, 2^8159463568 is an apocalyptic number.

It is an amenable number.

8159463568 is a deficient number, since it is larger than the sum of its proper divisors (7806024620).

8159463568 is a wasteful number, since it uses less digits than its factorization.

8159463568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5049282 (or 5049276 counting only the distinct ones).

The product of its digits is 6220800, while the sum is 55.

The square root of 8159463568 is about 90329.7490752631. The cubic root of 8159463568 is about 2013.2013017619.

The spelling of 8159463568 in words is "eight billion, one hundred fifty-nine million, four hundred sixty-three thousand, five hundred sixty-eight".