635768370673 has 2 divisors, whose sum is σ = 635768370674. Its totient is φ = 635768370672.

The previous prime is 635768370641. The next prime is 635768370697. The reversal of 635768370673 is 376073867536.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 321611483664 + 314156887009 = 567108^2 + 560497^2 .

It is a cyclic number.

It is not a de Polignac number, because 635768370673 - 2⁵ = 635768370641 is a prime.

It is a super-2 number, since 2×635768370673² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (635768370613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317884185336 + 317884185337.

It is an arithmetic number, because the mean of its divisors is an integer number (317884185337).

Almost surely, 2^635768370673 is an apocalyptic number.

It is an amenable number.

635768370673 is a deficient number, since it is larger than the sum of its proper divisors (1).

635768370673 is an equidigital number, since it uses as much as digits as its factorization.

635768370673 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80015040, while the sum is 61.

The spelling of 635768370673 in words is "six hundred thirty-five billion, seven hundred sixty-eight million, three hundred seventy thousand, six hundred seventy-three".