634161128 has 16 divisors (see below), whose sum is σ = 1199962500. Its totient is φ = 314171136.

The previous prime is 634161127. The next prime is 634161131. The reversal of 634161128 is 821161436.

634161128 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 630913924 + 3247204 = 25118^2 + 1802^2 .

It is a junction number, because it is equal to n+sod(n) for n = 634161094 and 634161103.

It is not an unprimeable number, because it can be changed into a prime (634161127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 362753 + ... + 364496.

Almost surely, 2^634161128 is an apocalyptic number.

It is an amenable number.

634161128 is a deficient number, since it is larger than the sum of its proper divisors (565801372).

634161128 is a wasteful number, since it uses less digits than its factorization.

634161128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 727364 (or 727360 counting only the distinct ones).

The product of its digits is 6912, while the sum is 32.

The square root of 634161128 is about 25182.5560259478. The cubic root of 634161128 is about 859.1451429651.

The spelling of 634161128 in words is "six hundred thirty-four million, one hundred sixty-one thousand, one hundred twenty-eight".