9818686656 has 42 divisors (see below), whose sum is σ = 28143494132. Its totient is φ = 3272895360.

The previous prime is 9818686643. The next prime is 9818686663. The reversal of 9818686656 is 6566868189.

It is a junction number, because it is equal to n+sod(n) for n = 9818686593 and 9818686602.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8522590 + ... + 8523741.

Almost surely, 2^9818686656 is an apocalyptic number.

9818686656 is a gapful number since it is divisible by the number (96) formed by its first and last digit.

It is an amenable number.

9818686656 is an abundant number, since it is smaller than the sum of its proper divisors (18324807476).

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

9818686656 is a wasteful number, since it uses less digits than its factorization.

9818686656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17046349 (or 17046336 counting only the distinct ones).

The product of its digits is 29859840, while the sum is 63.

The square root of 9818686656 is about 99089.2862826249. The cubic root of 9818686656 is about 2141.3342667704.

The spelling of 9818686656 in words is "nine billion, eight hundred eighteen million, six hundred eighty-six thousand, six hundred fifty-six".