8540686817 has 8 divisors (see below), whose sum is σ = 9238184256. Its totient is φ = 7848978192.

The previous prime is 8540686813. The next prime is 8540686859. The reversal of 8540686817 is 7186860458.

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

It is a cyclic number.

It is not a de Polignac number, because 8540686817 - 2² = 8540686813 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8540686813) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1444133 + ... + 1450034.

It is an arithmetic number, because the mean of its divisors is an integer number (1154773032).

Almost surely, 2^8540686817 is an apocalyptic number.

It is an amenable number.

8540686817 is a deficient number, since it is larger than the sum of its proper divisors (697497439).

8540686817 is a wasteful number, since it uses less digits than its factorization.

8540686817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2894407.

The product of its (nonzero) digits is 2580480, while the sum is 53.

The square root of 8540686817 is about 92415.8363972323. The cubic root of 8540686817 is about 2044.0786349274.

The spelling of 8540686817 in words is "eight billion, five hundred forty million, six hundred eighty-six thousand, eight hundred seventeen".