635606046205601 has 4 divisors (see below), whose sum is σ = 635619191375172. Its totient is φ = 635592901036032.

The previous prime is 635606046205597. The next prime is 635606046205649. The reversal of 635606046205601 is 106502640606536.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 95431797966400 + 540174248239201 = 9768920^2 + 23241649^2 .

It is a cyclic number.

It is not a de Polignac number, because 635606046205601 - 2² = 635606046205597 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 635606046205601.

It is not an unprimeable number, because it can be changed into a prime (635606046205651) 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 in 3 ways as a sum of consecutive naturals, for example, 6572512256 + ... + 6572608961.

It is an arithmetic number, because the mean of its divisors is an integer number (158904797843793).

Almost surely, 2^{635606046205601} is an apocalyptic number.

It is an amenable number.

635606046205601 is a deficient number, since it is larger than the sum of its proper divisors (13145169571).

635606046205601 is a wasteful number, since it uses less digits than its factorization.

635606046205601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13145169570.

The product of its (nonzero) digits is 4665600, while the sum is 50.

The spelling of 635606046205601 in words is "six hundred thirty-five trillion, six hundred six billion, forty-six million, two hundred five thousand, six hundred one".