7232736721 has 8 divisors (see below), whose sum is σ = 8292912320. Its totient is φ = 6179293008.

The previous prime is 7232736673. The next prime is 7232736737. The reversal of 7232736721 is 1276372327.

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

It is not a de Polignac number, because 7232736721 - 2¹¹ = 7232734673 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7232731721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1680666 + ... + 1684963.

It is an arithmetic number, because the mean of its divisors is an integer number (1036614040).

Almost surely, 2^7232736721 is an apocalyptic number.

It is an amenable number.

7232736721 is a deficient number, since it is larger than the sum of its proper divisors (1060175599).

7232736721 is a wasteful number, since it uses less digits than its factorization.

7232736721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3365943.

The product of its digits is 148176, while the sum is 40.

The square root of 7232736721 is about 85045.4979466873. The cubic root of 7232736721 is about 1933.9009149608.

The spelling of 7232736721 in words is "seven billion, two hundred thirty-two million, seven hundred thirty-six thousand, seven hundred twenty-one".