8649718686 has 24 divisors (see below), whose sum is σ = 21418351344. Its totient is φ = 2471348160.

The previous prime is 8649718661. The next prime is 8649718703. The reversal of 8649718686 is 6868179468.

8649718686 is a `hidden beast` number, since 86 + 497 + 1 + 8 + 68 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34324155 + ... + 34324406.

It is an arithmetic number, because the mean of its divisors is an integer number (892431306).

Almost surely, 2^8649718686 is an apocalyptic number.

8649718686 is an abundant number, since it is smaller than the sum of its proper divisors (12768632658).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8649718686 is a wasteful number, since it uses less digits than its factorization.

8649718686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68648576 (or 68648573 counting only the distinct ones).

The product of its digits is 27869184, while the sum is 63.

The square root of 8649718686 is about 93003.8638229617. The cubic root of 8649718686 is about 2052.7402328642.

The spelling of 8649718686 in words is "eight billion, six hundred forty-nine million, seven hundred eighteen thousand, six hundred eighty-six".