8649206556858 has 96 divisors (see below), whose sum is σ = 21742280501760. Its totient is φ = 2433835123200.

The previous prime is 8649206556853. The next prime is 8649206556923. The reversal of 8649206556858 is 8586556029468.

8649206556858 is a `hidden beast` number, since 8 + 6 + 4 + 9 + 2 + 0 + 6 + 5 + 568 + 58 = 666.

It is not an unprimeable number, because it can be changed into a prime (8649206556853) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2908116 + ... + 5074992.

It is an arithmetic number, because the mean of its divisors is an integer number (226482088560).

Almost surely, 2^{8649206556858} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8649206556858, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10871140250880).

8649206556858 is an abundant number, since it is smaller than the sum of its proper divisors (13093073944902).

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

8649206556858 is a wasteful number, since it uses less digits than its factorization.

8649206556858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2167372 (or 2167369 counting only the distinct ones).

The product of its (nonzero) digits is 995328000, while the sum is 72.

The spelling of 8649206556858 in words is "eight trillion, six hundred forty-nine billion, two hundred six million, five hundred fifty-six thousand, eight hundred fifty-eight".