10686687281 has 2 divisors, whose sum is σ = 10686687282. Its totient is φ = 10686687280.

The previous prime is 10686687247. The next prime is 10686687299. The reversal of 10686687281 is 18278668601.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7552479025 + 3134208256 = 86905^2 + 55984^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10686687281 is a prime.

It is a super-2 number, since 2×10686687281² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (10686687241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5343343640 + 5343343641.

It is an arithmetic number, because the mean of its divisors is an integer number (5343343641).

Almost surely, 2^10686687281 is an apocalyptic number.

It is an amenable number.

10686687281 is a deficient number, since it is larger than the sum of its proper divisors (1).

10686687281 is an equidigital number, since it uses as much as digits as its factorization.

10686687281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1548288, while the sum is 53.

The spelling of 10686687281 in words is "ten billion, six hundred eighty-six million, six hundred eighty-seven thousand, two hundred eighty-one".