63438704420 has 576 divisors, whose sum is σ = 188337623040. Its totient is φ = 17394600960.

The previous prime is 63438704387. The next prime is 63438704429. The reversal of 63438704420 is 2440783436.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (63438704429) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 764321699 + ... + 764321781.

It is an arithmetic number, because the mean of its divisors is an integer number (326975040).

Almost surely, 2^63438704420 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 63438704420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94168811520).

63438704420 is an abundant number, since it is smaller than the sum of its proper divisors (124898918620).

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

63438704420 is a wasteful number, since it uses less digits than its factorization.

63438704420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216 (or 183 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 41.

The spelling of 63438704420 in words is "sixty-three billion, four hundred thirty-eight million, seven hundred four thousand, four hundred twenty".