8159478578 has 8 divisors (see below), whose sum is σ = 12470146668. Its totient is φ = 4002763024.

The previous prime is 8159478571. The next prime is 8159478589. The reversal of 8159478578 is 8758749518.

It can be written as a sum of positive squares in 2 ways, for example, as 7819334329 + 340144249 = 88427^2 + 18443^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 8159478578.

It is not an unprimeable number, because it can be changed into a prime (8159478571) 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, 38488001 + ... + 38488212.

Almost surely, 2^8159478578 is an apocalyptic number.

8159478578 is a deficient number, since it is larger than the sum of its proper divisors (4310668090).

8159478578 is a wasteful number, since it uses less digits than its factorization.

8159478578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76976268.

The product of its digits is 22579200, while the sum is 62.

The square root of 8159478578 is about 90329.8321597024. The cubic root of 8159478578 is about 2013.2025362439.

The spelling of 8159478578 in words is "eight billion, one hundred fifty-nine million, four hundred seventy-eight thousand, five hundred seventy-eight".