632655821920 has 144 divisors (see below), whose sum is σ = 1552494172320. Its totient is φ = 243618693120.

The previous prime is 632655821893. The next prime is 632655821921. The reversal of 632655821920 is 29128556236.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (632655821921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29665021 + ... + 29686339.

It is an arithmetic number, because the mean of its divisors is an integer number (10781209530).

Almost surely, 2^632655821920 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 632655821920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (776247086160).

632655821920 is an abundant number, since it is smaller than the sum of its proper divisors (919838350400).

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

632655821920 is a wasteful number, since it uses less digits than its factorization.

632655821920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21589 (or 21550 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 49.

The spelling of 632655821920 in words is "six hundred thirty-two billion, six hundred fifty-five million, eight hundred twenty-one thousand, nine hundred twenty".