63243043721 has 8 divisors (see below), whose sum is σ = 74299520064. Its totient is φ = 53071085520.

The previous prime is 63243043711. The next prime is 63243043723. The reversal of 63243043721 is 12734034236.

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 63243043721 - 2⁶ = 63243043657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (63243043723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 221129381 + ... + 221129666.

It is an arithmetic number, because the mean of its divisors is an integer number (9287440008).

Almost surely, 2^63243043721 is an apocalyptic number.

It is an amenable number.

63243043721 is a deficient number, since it is larger than the sum of its proper divisors (11056476343).

63243043721 is a wasteful number, since it uses less digits than its factorization.

63243043721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442259071.

The product of its (nonzero) digits is 72576, while the sum is 35.

Adding to 63243043721 its reverse (12734034236), we get a palindrome (75977077957).

The spelling of 63243043721 in words is "sixty-three billion, two hundred forty-three million, forty-three thousand, seven hundred twenty-one".