635279865797 has 2 divisors, whose sum is σ = 635279865798. Its totient is φ = 635279865796.

The previous prime is 635279865719. The next prime is 635279865919. The reversal of 635279865797 is 797568972536.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 464941241956 + 170338623841 = 681866^2 + 412721^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-635279865797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (635279895797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317639932898 + 317639932899.

It is an arithmetic number, because the mean of its divisors is an integer number (317639932899).

Almost surely, 2^635279865797 is an apocalyptic number.

It is an amenable number.

635279865797 is a deficient number, since it is larger than the sum of its proper divisors (1).

635279865797 is an equidigital number, since it uses as much as digits as its factorization.

635279865797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1200225600, while the sum is 74.

The spelling of 635279865797 in words is "six hundred thirty-five billion, two hundred seventy-nine million, eight hundred sixty-five thousand, seven hundred ninety-seven".