8117520218 has 32 divisors (see below), whose sum is σ = 12597923520. Its totient is φ = 3920400000.

The previous prime is 8117520217. The next prime is 8117520223. The reversal of 8117520218 is 8120257118.

It is not an unprimeable number, because it can be changed into a prime (8117520217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3724253 + ... + 3726431.

It is an arithmetic number, because the mean of its divisors is an integer number (393685110).

Almost surely, 2^8117520218 is an apocalyptic number.

8117520218 is a deficient number, since it is larger than the sum of its proper divisors (4480403302).

8117520218 is a wasteful number, since it uses less digits than its factorization.

8117520218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2654.

The product of its (nonzero) digits is 8960, while the sum is 35.

The square root of 8117520218 is about 90097.2819678818. The cubic root of 8117520218 is about 2009.7457842070.

The spelling of 8117520218 in words is "eight billion, one hundred seventeen million, five hundred twenty thousand, two hundred eighteen".