635945700118061 has 2 divisors, whose sum is σ = 635945700118062. Its totient is φ = 635945700118060.

The previous prime is 635945700118039. The next prime is 635945700118093. The reversal of 635945700118061 is 160811007549536.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 369447225420100 + 266498474697961 = 19221010^2 + 16324781^2 .

It is a cyclic number.

It is not a de Polignac number, because 635945700118061 - 2³⁴ = 635928520248877 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 635945700117988 and 635945700118006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (635945700118021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317972850059030 + 317972850059031.

It is an arithmetic number, because the mean of its divisors is an integer number (317972850059031).

Almost surely, 2^{635945700118061} is an apocalyptic number.

It is an amenable number.

635945700118061 is a deficient number, since it is larger than the sum of its proper divisors (1).

635945700118061 is an equidigital number, since it uses as much as digits as its factorization.

635945700118061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5443200, while the sum is 56.

The spelling of 635945700118061 in words is "six hundred thirty-five trillion, nine hundred forty-five billion, seven hundred million, one hundred eighteen thousand, sixty-one".