636084668249 has 2 divisors, whose sum is σ = 636084668250. Its totient is φ = 636084668248.

The previous prime is 636084668239. The next prime is 636084668251. The reversal of 636084668249 is 942866480636.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 612204529225 + 23880139024 = 782435^2 + 154532^2 .

It is a cyclic number.

It is not a de Polignac number, because 636084668249 - 2⁸ = 636084667993 is a prime.

Together with 636084668251, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 636084668191 and 636084668200.

It is not a weakly prime, because it can be changed into another prime (636084668239) 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, 318042334124 + 318042334125.

It is an arithmetic number, because the mean of its divisors is an integer number (318042334125).

Almost surely, 2^636084668249 is an apocalyptic number.

It is an amenable number.

636084668249 is a deficient number, since it is larger than the sum of its proper divisors (1).

636084668249 is an equidigital number, since it uses as much as digits as its factorization.

636084668249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 71663616, while the sum is 62.

The spelling of 636084668249 in words is "six hundred thirty-six billion, eighty-four million, six hundred sixty-eight thousand, two hundred forty-nine".