447517249921 has 16 divisors (see below), whose sum is σ = 542237794560. Its totient is φ = 360552775680.

The previous prime is 447517249891. The next prime is 447517249931. The reversal of 447517249921 is 129942715744.

It is a cyclic number.

It is not a de Polignac number, because 447517249921 - 2⁹ = 447517249409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (447517249931) 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, 2353645 + ... + 2536666.

It is an arithmetic number, because the mean of its divisors is an integer number (33889862160).

Almost surely, 2^447517249921 is an apocalyptic number.

It is an amenable number.

447517249921 is a deficient number, since it is larger than the sum of its proper divisors (94720544639).

447517249921 is a wasteful number, since it uses less digits than its factorization.

447517249921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4891104.

The product of its digits is 5080320, while the sum is 55.

The spelling of 447517249921 in words is "four hundred forty-seven billion, five hundred seventeen million, two hundred forty-nine thousand, nine hundred twenty-one".