634305326565664 has 96 divisors (see below), whose sum is σ = 1347155610623424. Its totient is φ = 292254324894720.

The previous prime is 634305326565619. The next prime is 634305326565683. The reversal of 634305326565664 is 466565623503436.

It is a junction number, because it is equal to n+sod(n) for n = 634305326565596 and 634305326565605.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3254569659 + ... + 3254764549.

It is an arithmetic number, because the mean of its divisors is an integer number (14032870943994).

Almost surely, 2^{634305326565664} 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 634305326565664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (673577805311712).

634305326565664 is an abundant number, since it is smaller than the sum of its proper divisors (712850284057760).

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

634305326565664 is a wasteful number, since it uses less digits than its factorization.

634305326565664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208290 (or 208282 counting only the distinct ones).

The product of its (nonzero) digits is 839808000, while the sum is 64.

The spelling of 634305326565664 in words is "six hundred thirty-four trillion, three hundred five billion, three hundred twenty-six million, five hundred sixty-five thousand, six hundred sixty-four".