8518642243 has 8 divisors (see below), whose sum is σ = 8548768656. Its totient is φ = 8488550400.

The previous prime is 8518642177. The next prime is 8518642271. The reversal of 8518642243 is 3422468158.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8518642243 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8518642243.

It is not an unprimeable number, because it can be changed into a prime (8518642543) 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, 546883 + ... + 562243.

It is an arithmetic number, because the mean of its divisors is an integer number (1068596082).

Almost surely, 2^8518642243 is an apocalyptic number.

8518642243 is a deficient number, since it is larger than the sum of its proper divisors (30126413).

8518642243 is a wasteful number, since it uses less digits than its factorization.

8518642243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17285.

The product of its digits is 368640, while the sum is 43.

The square root of 8518642243 is about 92296.4909571323. The cubic root of 8518642243 is about 2042.3184459795.

The spelling of 8518642243 in words is "eight billion, five hundred eighteen million, six hundred forty-two thousand, two hundred forty-three".