634447534489 has 4 divisors (see below), whose sum is σ = 634717399680. Its totient is φ = 634177669300.

The previous prime is 634447534459. The next prime is 634447534549. The reversal of 634447534489 is 984435744436.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 634447534489 - 2¹⁹ = 634447010201 is a prime.

It is a super-2 number, since 2×634447534489² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (634447534439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134929069 + ... + 134933770.

It is an arithmetic number, because the mean of its divisors is an integer number (158679349920).

Almost surely, 2^634447534489 is an apocalyptic number.

It is an amenable number.

634447534489 is a deficient number, since it is larger than the sum of its proper divisors (269865191).

634447534489 is a wasteful number, since it uses less digits than its factorization.

634447534489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269865190.

The product of its digits is 139345920, while the sum is 61.

The spelling of 634447534489 in words is "six hundred thirty-four billion, four hundred forty-seven million, five hundred thirty-four thousand, four hundred eighty-nine".