634506616326 has 128 divisors (see below), whose sum is σ = 1466696678400. Its totient is φ = 181213760000.

The previous prime is 634506616313. The next prime is 634506616327. The reversal of 634506616326 is 623616605436.

634506616326 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×634506616326² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634506616327) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 13702180 + ... + 13748408.

It is an arithmetic number, because the mean of its divisors is an integer number (11458567800).

Almost surely, 2^634506616326 is an apocalyptic number.

634506616326 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 634506616326, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (733348339200).

634506616326 is an abundant number, since it is smaller than the sum of its proper divisors (832190062074).

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

634506616326 is a wasteful number, since it uses less digits than its factorization.

634506616326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46446.

The product of its (nonzero) digits is 2799360, while the sum is 48.

The spelling of 634506616326 in words is "six hundred thirty-four billion, five hundred six million, six hundred sixteen thousand, three hundred twenty-six".