636604771141 has 2 divisors, whose sum is σ = 636604771142. Its totient is φ = 636604771140.

The previous prime is 636604771097. The next prime is 636604771163. The reversal of 636604771141 is 141177406636.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 611875950625 + 24728820516 = 782225^2 + 157254^2 .

It is a cyclic number.

It is not a de Polignac number, because 636604771141 - 2⁹ = 636604770629 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 636604771091 and 636604771100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (636604771441) 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, 318302385570 + 318302385571.

It is an arithmetic number, because the mean of its divisors is an integer number (318302385571).

Almost surely, 2^636604771141 is an apocalyptic number.

It is an amenable number.

636604771141 is a deficient number, since it is larger than the sum of its proper divisors (1).

636604771141 is an equidigital number, since it uses as much as digits as its factorization.

636604771141 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 508032, while the sum is 46.

The spelling of 636604771141 in words is "six hundred thirty-six billion, six hundred four million, seven hundred seventy-one thousand, one hundred forty-one".