8186984881 has 2 divisors, whose sum is σ = 8186984882. Its totient is φ = 8186984880.

The previous prime is 8186984851. The next prime is 8186984909. The reversal of 8186984881 is 1884896818.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6409603600 + 1777381281 = 80060^2 + 42159^2 .

It is a cyclic number.

It is not a de Polignac number, because 8186984881 - 2⁷ = 8186984753 is a prime.

It is a super-2 number, since 2×8186984881² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8186984851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4093492440 + 4093492441.

It is an arithmetic number, because the mean of its divisors is an integer number (4093492441).

Almost surely, 2^8186984881 is an apocalyptic number.

It is an amenable number.

8186984881 is a deficient number, since it is larger than the sum of its proper divisors (1).

8186984881 is an equidigital number, since it uses as much as digits as its factorization.

8186984881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7077888, while the sum is 61.

The square root of 8186984881 is about 90481.9588702632. The cubic root of 8186984881 is about 2015.4622251537.

The spelling of 8186984881 in words is "eight billion, one hundred eighty-six million, nine hundred eighty-four thousand, eight hundred eighty-one".