634474910538 has 144 divisors (see below), whose sum is σ = 1690985237760. Its totient is φ = 171151747200.

The previous prime is 634474910473. The next prime is 634474910561. The reversal of 634474910538 is 835019474436.

634474910538 is a `hidden beast` number, since 6 + 34 + 4 + 74 + 9 + 1 + 0 + 538 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 838033 + ... + 1404011.

It is an arithmetic number, because the mean of its divisors is an integer number (11742953040).

Almost surely, 2^634474910538 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 634474910538, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (845492618880).

634474910538 is an abundant number, since it is smaller than the sum of its proper divisors (1056510327222).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

634474910538 is a wasteful number, since it uses less digits than its factorization.

634474910538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 566073 (or 566063 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 54.

The spelling of 634474910538 in words is "six hundred thirty-four billion, four hundred seventy-four million, nine hundred ten thousand, five hundred thirty-eight".