63421435456 has 28 divisors (see below), whose sum is σ = 127985001840. Its totient is φ = 31173246080.

The previous prime is 63421435447. The next prime is 63421435457. The reversal of 63421435456 is 65453412436.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (63421435457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8394190 + ... + 8401741.

Almost surely, 2^63421435456 is an apocalyptic number.

It is an amenable number.

63421435456 is an abundant number, since it is smaller than the sum of its proper divisors (64563566384).

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

63421435456 is a wasteful number, since it uses less digits than its factorization.

63421435456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16796002 (or 16795992 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 43.

The spelling of 63421435456 in words is "sixty-three billion, four hundred twenty-one million, four hundred thirty-five thousand, four hundred fifty-six".