8001705218 has 16 divisors (see below), whose sum is σ = 12927350520. Its totient is φ = 3692660736.

The previous prime is 8001705203. The next prime is 8001705233. The reversal of 8001705218 is 8125071008.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (8001705203) and next prime (8001705233).

It can be written as a sum of positive squares in 4 ways, for example, as 4158573169 + 3843132049 = 64487^2 + 61993^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 344888 + ... + 367356.

Almost surely, 2^8001705218 is an apocalyptic number.

8001705218 is a deficient number, since it is larger than the sum of its proper divisors (4925645302).

8001705218 is a wasteful number, since it uses less digits than its factorization.

8001705218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36181.

The product of its (nonzero) digits is 4480, while the sum is 32.

The square root of 8001705218 is about 89452.2510504906. The cubic root of 8001705218 is about 2000.1420914048.

The spelling of 8001705218 in words is "eight billion, one million, seven hundred five thousand, two hundred eighteen".