634849680972 has 90 divisors (see below), whose sum is σ = 1605934559684. Its totient is φ = 195194837760.

The previous prime is 634849680917. The next prime is 634849681003. The reversal of 634849680972 is 279086948436.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 466457572 + ... + 466458932.

Almost surely, 2^634849680972 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 634849680972, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (802967279842).

634849680972 is an abundant number, since it is smaller than the sum of its proper divisors (971084878712).

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

634849680972 is an frugal number, since it uses more digits than its factorization.

634849680972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2781 (or 1379 counting only the distinct ones).

The product of its (nonzero) digits is 125411328, while the sum is 66.

The spelling of 634849680972 in words is "six hundred thirty-four billion, eight hundred forty-nine million, six hundred eighty thousand, nine hundred seventy-two".