634447534459 has 2 divisors, whose sum is σ = 634447534460. Its totient is φ = 634447534458.

The previous prime is 634447534447. The next prime is 634447534549. The reversal of 634447534459 is 954435744436.

Together with next prime (634447534549) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-634447534459 is a prime.

It is a super-2 number, since 2×634447534459² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (634447534439) 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, 317223767229 + 317223767230.

It is an arithmetic number, because the mean of its divisors is an integer number (317223767230).

Almost surely, 2^634447534459 is an apocalyptic number.

634447534459 is a deficient number, since it is larger than the sum of its proper divisors (1).

634447534459 is an equidigital number, since it uses as much as digits as its factorization.

634447534459 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 87091200, while the sum is 58.

The spelling of 634447534459 in words is "six hundred thirty-four billion, four hundred forty-seven million, five hundred thirty-four thousand, four hundred fifty-nine".