634242125035567 has 2 divisors, whose sum is σ = 634242125035568. Its totient is φ = 634242125035566.

The previous prime is 634242125035529. The next prime is 634242125035639. The reversal of 634242125035567 is 765530521242436.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 634242125035567 - 2¹¹ = 634242125033519 is a prime.

It is a super-2 number, since 2×634242125035567² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (634242125035067) 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 as a sum of consecutive naturals, namely, 317121062517783 + 317121062517784.

It is an arithmetic number, because the mean of its divisors is an integer number (317121062517784).

Almost surely, 2^{634242125035567} is an apocalyptic number.

634242125035567 is a deficient number, since it is larger than the sum of its proper divisors (1).

634242125035567 is an equidigital number, since it uses as much as digits as its factorization.

634242125035567 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288000, while the sum is 55.

The spelling of 634242125035567 in words is "six hundred thirty-four trillion, two hundred forty-two billion, one hundred twenty-five million, thirty-five thousand, five hundred sixty-seven".