8681534681 has 2 divisors, whose sum is σ = 8681534682. Its totient is φ = 8681534680.

The previous prime is 8681534671. The next prime is 8681534699. The reversal of 8681534681 is 1864351868.

8681534681 = 65884² + 65885².

8681534681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4340833225 + 4340701456 = 65885^2 + 65884^2 .

It is a cyclic number.

It is not a de Polignac number, because 8681534681 - 2¹⁴ = 8681518297 is a prime.

It is a super-2 number, since 2×8681534681² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8681534671) 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 as a sum of consecutive naturals, namely, 4340767340 + 4340767341.

It is an arithmetic number, because the mean of its divisors is an integer number (4340767341).

Almost surely, 2^8681534681 is an apocalyptic number.

8681534681 is the 65885-th centered square number.

It is an amenable number.

8681534681 is a deficient number, since it is larger than the sum of its proper divisors (1).

8681534681 is an equidigital number, since it uses as much as digits as its factorization.

8681534681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1105920, while the sum is 50.

The square root of 8681534681 is about 93174.7534528533. The cubic root of 8681534681 is about 2055.2539970954.

The spelling of 8681534681 in words is "eight billion, six hundred eighty-one million, five hundred thirty-four thousand, six hundred eighty-one".