63434904221 has 8 divisors (see below), whose sum is σ = 68324194680. Its totient is φ = 58546996992.

The previous prime is 63434904193. The next prime is 63434904263. The reversal of 63434904221 is 12240943436.

It is a happy number.

63434904221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 940900 + 63433963321 = 970^2 + 251861^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 63434904221 - 2²⁶ = 63367795357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63434964221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 249560 + ... + 434913.

It is an arithmetic number, because the mean of its divisors is an integer number (8540524335).

Almost surely, 2^63434904221 is an apocalyptic number.

It is an amenable number.

63434904221 is a deficient number, since it is larger than the sum of its proper divisors (4889290459).

63434904221 is a wasteful number, since it uses less digits than its factorization.

63434904221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691615.

The product of its (nonzero) digits is 124416, while the sum is 38.

The spelling of 63434904221 in words is "sixty-three billion, four hundred thirty-four million, nine hundred four thousand, two hundred twenty-one".