8129706418 has 8 divisors (see below), whose sum is σ = 12221013420. Its totient is φ = 4056035280.

The previous prime is 8129706407. The next prime is 8129706437. The reversal of 8129706418 is 8146079218.

It can be written as a sum of positive squares in 2 ways, for example, as 7646278249 + 483428169 = 87443^2 + 21987^2 .

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

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 4407813 + ... + 4409656.

Almost surely, 2^8129706418 is an apocalyptic number.

8129706418 is a deficient number, since it is larger than the sum of its proper divisors (4091307002).

8129706418 is a wasteful number, since it uses less digits than its factorization.

8129706418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8817932.

The product of its (nonzero) digits is 193536, while the sum is 46.

The square root of 8129706418 is about 90164.8846170171. The cubic root of 8129706418 is about 2010.7509729046.

The spelling of 8129706418 in words is "eight billion, one hundred twenty-nine million, seven hundred six thousand, four hundred eighteen".