4384081376721 has 16 divisors (see below), whose sum is σ = 6575119763520. Its totient is φ = 2922720916356.

The previous prime is 4384081376713. The next prime is 4384081376749. The reversal of 4384081376721 is 1276731804834.

4384081376721 is a `hidden beast` number, since 4 + 38 + 408 + 137 + 6 + 72 + 1 = 666.

It is not a de Polignac number, because 4384081376721 - 2³ = 4384081376713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4384081376711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1002302655 + ... + 1002307028.

It is an arithmetic number, because the mean of its divisors is an integer number (410944985220).

Almost surely, 2^{4384081376721} is an apocalyptic number.

It is an amenable number.

4384081376721 is a deficient number, since it is larger than the sum of its proper divisors (2191038386799).

4384081376721 is an frugal number, since it uses more digits than its factorization.

4384081376721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2004609704 (or 2004609686 counting only the distinct ones).

The product of its (nonzero) digits is 5419008, while the sum is 54.

The spelling of 4384081376721 in words is "four trillion, three hundred eighty-four billion, eighty-one million, three hundred seventy-six thousand, seven hundred twenty-one".