447563065721 has 16 divisors (see below), whose sum is σ = 474542530560. Its totient is φ = 421234284240.

The previous prime is 447563065711. The next prime is 447563065723. The reversal of 447563065721 is 127560365744.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-447563065721 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 447563065721.

It is not an unprimeable number, because it can be changed into a prime (447563065723) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 548960 + ... + 1093838.

It is an arithmetic number, because the mean of its divisors is an integer number (29658908160).

Almost surely, 2^447563065721 is an apocalyptic number.

It is an amenable number.

447563065721 is a deficient number, since it is larger than the sum of its proper divisors (26979464839).

447563065721 is a wasteful number, since it uses less digits than its factorization.

447563065721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545476.

The product of its (nonzero) digits is 4233600, while the sum is 50.

The spelling of 447563065721 in words is "four hundred forty-seven billion, five hundred sixty-three million, sixty-five thousand, seven hundred twenty-one".