9816686811 has 8 divisors (see below), whose sum is σ = 14543239760. Its totient is φ = 6544457856.

The previous prime is 9816686809. The next prime is 9816686837. The reversal of 9816686811 is 1186866189.

It is not a de Polignac number, because 9816686811 - 2¹ = 9816686809 is a prime.

It is a super-2 number, since 2×9816686811² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9816686801) 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, 181790470 + ... + 181790523.

It is an arithmetic number, because the mean of its divisors is an integer number (1817904970).

Almost surely, 2^9816686811 is an apocalyptic number.

9816686811 is a deficient number, since it is larger than the sum of its proper divisors (4726552949).

9816686811 is a wasteful number, since it uses less digits than its factorization.

9816686811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363581002 (or 363580996 counting only the distinct ones).

The product of its digits is 995328, while the sum is 54.

The square root of 9816686811 is about 99079.1946424677. The cubic root of 9816686811 is about 2141.1888764024.

The spelling of 9816686811 in words is "nine billion, eight hundred sixteen million, six hundred eighty-six thousand, eight hundred eleven".