9656818974881 has 48 divisors (see below), whose sum is σ = 11095943459328. Its totient is φ = 8352820147200.

The previous prime is 9656818974877. The next prime is 9656818974889. The reversal of 9656818974881 is 1884798186569.

It is not a de Polignac number, because 9656818974881 - 2² = 9656818974877 is a prime.

It is a super-2 number, since 2×9656818974881² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 9656818974796 and 9656818974805.

It is not an unprimeable number, because it can be changed into a prime (9656818974889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1099485416 + ... + 1099494198.

It is an arithmetic number, because the mean of its divisors is an integer number (231165488736).

Almost surely, 2^{9656818974881} is an apocalyptic number.

It is an amenable number.

9656818974881 is a deficient number, since it is larger than the sum of its proper divisors (1439124484447).

9656818974881 is a wasteful number, since it uses less digits than its factorization.

9656818974881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10082 (or 10065 counting only the distinct ones).

The product of its digits is 1672151040, while the sum is 80.

The spelling of 9656818974881 in words is "nine trillion, six hundred fifty-six billion, eight hundred eighteen million, nine hundred seventy-four thousand, eight hundred eighty-one".