5605732721 has 8 divisors (see below), whose sum is σ = 5702373600. Its totient is φ = 5509146240.

The previous prime is 5605732687. The next prime is 5605732747. The reversal of 5605732721 is 1272375065.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-5605732721 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5605732771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 232106 + ... + 255116.

It is an arithmetic number, because the mean of its divisors is an integer number (712796700).

Almost surely, 2^5605732721 is an apocalyptic number.

It is an amenable number.

5605732721 is a deficient number, since it is larger than the sum of its proper divisors (96640879).

5605732721 is a wasteful number, since it uses less digits than its factorization.

5605732721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27199.

The product of its (nonzero) digits is 88200, while the sum is 38.

The square root of 5605732721 is about 74871.4412910557. The cubic root of 5605732721 is about 1776.4137618173.

The spelling of 5605732721 in words is "five billion, six hundred five million, seven hundred thirty-two thousand, seven hundred twenty-one".