634719553 has 12 divisors (see below), whose sum is σ = 689210940. Its totient is φ = 584266176.

The previous prime is 634719521. The next prime is 634719559. The reversal of 634719553 is 355917436.

It can be written as a sum of positive squares in 6 ways, for example, as 144672784 + 490046769 = 12028^2 + 22137^2 .

It is not a de Polignac number, because 634719553 - 2⁵ = 634719521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (634719559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 58003 + ... + 68071.

It is an arithmetic number, because the mean of its divisors is an integer number (57434245).

Almost surely, 2^634719553 is an apocalyptic number.

It is an amenable number.

634719553 is a deficient number, since it is larger than the sum of its proper divisors (54491387).

634719553 is a wasteful number, since it uses less digits than its factorization.

634719553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10468 (or 10455 counting only the distinct ones).

The product of its digits is 340200, while the sum is 43.

The square root of 634719553 is about 25193.6411223150. The cubic root of 634719553 is about 859.3972489103.

The spelling of 634719553 in words is "six hundred thirty-four million, seven hundred nineteen thousand, five hundred fifty-three".