9573784632721 has 16 divisors (see below), whose sum is σ = 9759732890688. Its totient is φ = 9388777262400.

The previous prime is 9573784632697. The next prime is 9573784632821. The reversal of 9573784632721 is 1272364873759.

It is a cyclic number.

It is not a de Polignac number, because 9573784632721 - 2³⁷ = 9436345679249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9573784632221) 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 15 ways as a sum of consecutive naturals, for example, 334487791 + ... + 334516411.

It is an arithmetic number, because the mean of its divisors is an integer number (609983305668).

Almost surely, 2^{9573784632721} is an apocalyptic number.

It is an amenable number.

9573784632721 is a deficient number, since it is larger than the sum of its proper divisors (185948257967).

9573784632721 is a wasteful number, since it uses less digits than its factorization.

9573784632721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44832.

The product of its digits is 106686720, while the sum is 64.

The spelling of 9573784632721 in words is "nine trillion, five hundred seventy-three billion, seven hundred eighty-four million, six hundred thirty-two thousand, seven hundred twenty-one".