63621104640 has 176 divisors, whose sum is σ = 215458900992. Its totient is φ = 15967584256.

The previous prime is 63621104621. The next prime is 63621104689. The reversal of 63621104640 is 4640112636.

It is a super-2 number, since 2×63621104640² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 139297 + ... + 382943.

Almost surely, 2^63621104640 is an apocalyptic number.

63621104640 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 63621104640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107729450496).

63621104640 is an abundant number, since it is smaller than the sum of its proper divisors (151837796352).

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

63621104640 is a wasteful number, since it uses less digits than its factorization.

63621104640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243692 (or 243674 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 33.

The spelling of 63621104640 in words is "sixty-three billion, six hundred twenty-one million, one hundred four thousand, six hundred forty".