635755681123 has 2 divisors, whose sum is σ = 635755681124. Its totient is φ = 635755681122.

The previous prime is 635755681103. The next prime is 635755681157. The reversal of 635755681123 is 321186557536.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 635755681123 - 2⁵ = 635755681091 is a prime.

It is a super-2 number, since 2×635755681123² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (635755681103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317877840561 + 317877840562.

It is an arithmetic number, because the mean of its divisors is an integer number (317877840562).

Almost surely, 2^635755681123 is an apocalyptic number.

635755681123 is a deficient number, since it is larger than the sum of its proper divisors (1).

635755681123 is an equidigital number, since it uses as much as digits as its factorization.

635755681123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4536000, while the sum is 52.

The spelling of 635755681123 in words is "six hundred thirty-five billion, seven hundred fifty-five million, six hundred eighty-one thousand, one hundred twenty-three".