634021063680 has 176 divisors, whose sum is σ = 2043850567680. Its totient is φ = 167740489728.

The previous prime is 634021063667. The next prime is 634021063721. The reversal of 634021063680 is 86360120436.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1788211 + ... + 2113229.

Almost surely, 2^634021063680 is an apocalyptic number.

634021063680 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 634021063680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1021925283840).

634021063680 is an abundant number, since it is smaller than the sum of its proper divisors (1409829504000).

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

634021063680 is a wasteful number, since it uses less digits than its factorization.

634021063680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325174 (or 325156 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 39.

The spelling of 634021063680 in words is "six hundred thirty-four billion, twenty-one million, sixty-three thousand, six hundred eighty".