634443652032 has 112 divisors (see below), whose sum is σ = 1711542172032. Its totient is φ = 207340856320.

The previous prime is 634443651971. The next prime is 634443652033. The reversal of 634443652032 is 230256344436.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634443652033) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14499307 + ... + 14542997.

It is an arithmetic number, because the mean of its divisors is an integer number (15281626536).

Almost surely, 2^634443652032 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 634443652032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (855771086016).

634443652032 is an abundant number, since it is smaller than the sum of its proper divisors (1077098520000).

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

634443652032 is a wasteful number, since it uses less digits than its factorization.

634443652032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45186 (or 45176 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 42.

Adding to 634443652032 its reverse (230256344436), we get a palindrome (864699996468).

The spelling of 634443652032 in words is "six hundred thirty-four billion, four hundred forty-three million, six hundred fifty-two thousand, thirty-two".