63447786648 has 320 divisors, whose sum is σ = 204919308000. Its totient is φ = 18205544448.

The previous prime is 63447786643. The next prime is 63447786659. The reversal of 63447786648 is 84668774436.

It is a happy number.

63447786648 is a `hidden beast` number, since 63 + 4 + 477 + 8 + 66 + 48 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63447786643) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 6064590 + ... + 6075042.

Almost surely, 2^63447786648 is an apocalyptic number.

63447786648 is a gapful number since it is divisible by the number (68) 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 63447786648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102459654000).

63447786648 is an abundant number, since it is smaller than the sum of its proper divisors (141471521352).

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

63447786648 is a wasteful number, since it uses less digits than its factorization.

63447786648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10536 (or 10523 counting only the distinct ones).

The product of its digits is 130056192, while the sum is 63.

The spelling of 63447786648 in words is "sixty-three billion, four hundred forty-seven million, seven hundred eighty-six thousand, six hundred forty-eight".