634447744435 has 12 divisors (see below), whose sum is σ = 808756226928. Its totient is φ = 477701830016.

The previous prime is 634447744429. The next prime is 634447744451. The reversal of 634447744435 is 534447744436.

It is not a de Polignac number, because 634447744435 - 2¹¹ = 634447742387 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 219530647 + ... + 219533536.

It is an arithmetic number, because the mean of its divisors is an integer number (67396352244).

Almost surely, 2^634447744435 is an apocalyptic number.

634447744435 is a deficient number, since it is larger than the sum of its proper divisors (174308482493).

634447744435 is a wasteful number, since it uses less digits than its factorization.

634447744435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439064222 (or 439064205 counting only the distinct ones).

The product of its digits is 54190080, while the sum is 55.

Subtracting from 634447744435 its reverse (534447744436), we obtain a palindrome (99999999999).

The spelling of 634447744435 in words is "six hundred thirty-four billion, four hundred forty-seven million, seven hundred forty-four thousand, four hundred thirty-five".