36685686281 has 2 divisors, whose sum is σ = 36685686282. Its totient is φ = 36685686280.

The previous prime is 36685686263. The next prime is 36685686337. The reversal of 36685686281 is 18268658663.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31336080400 + 5349605881 = 177020^2 + 73141^2 .

It is a cyclic number.

It is not a de Polignac number, because 36685686281 - 2¹⁴ = 36685669897 is a prime.

It is a super-2 number, since 2×36685686281² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 36685686281.

It is not a weakly prime, because it can be changed into another prime (36685586281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18342843140 + 18342843141.

It is an arithmetic number, because the mean of its divisors is an integer number (18342843141).

Almost surely, 2^36685686281 is an apocalyptic number.

It is an amenable number.

36685686281 is a deficient number, since it is larger than the sum of its proper divisors (1).

36685686281 is an equidigital number, since it uses as much as digits as its factorization.

36685686281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19906560, while the sum is 59.

The spelling of 36685686281 in words is "thirty-six billion, six hundred eighty-five million, six hundred eighty-six thousand, two hundred eighty-one".