8638518613 has 8 divisors (see below), whose sum is σ = 8678266688. Its totient is φ = 8598848544.

The previous prime is 8638518611. The next prime is 8638518617. The reversal of 8638518613 is 3168158368.

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 8638518613 - 2¹ = 8638518611 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8638518611) 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, 208570 + ... + 246532.

It is an arithmetic number, because the mean of its divisors is an integer number (1084783336).

Almost surely, 2^8638518613 is an apocalyptic number.

It is an amenable number.

8638518613 is a deficient number, since it is larger than the sum of its proper divisors (39748075).

8638518613 is a wasteful number, since it uses less digits than its factorization.

8638518613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39003.

The product of its digits is 829440, while the sum is 49.

The square root of 8638518613 is about 92943.6313740753. The cubic root of 8638518613 is about 2051.8538544877.

The spelling of 8638518613 in words is "eight billion, six hundred thirty-eight million, five hundred eighteen thousand, six hundred thirteen".