724415728821 has 16 divisors (see below), whose sum is σ = 972462456000. Its totient is φ = 479657026688.

The previous prime is 724415728807. The next prime is 724415728867. The reversal of 724415728821 is 128827514427.

It is a cyclic number.

It is not a de Polignac number, because 724415728821 - 2⁵ = 724415728789 is a prime.

It is a super-2 number, since 2×724415728821² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (724415728321) 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 15 ways as a sum of consecutive naturals, for example, 5010670 + ... + 5153216.

It is an arithmetic number, because the mean of its divisors is an integer number (60778903500).

Almost surely, 2^724415728821 is an apocalyptic number.

It is an amenable number.

724415728821 is a deficient number, since it is larger than the sum of its proper divisors (248046727179).

724415728821 is a wasteful number, since it uses less digits than its factorization.

724415728821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154068.

The product of its digits is 2007040, while the sum is 51.

The spelling of 724415728821 in words is "seven hundred twenty-four billion, four hundred fifteen million, seven hundred twenty-eight thousand, eight hundred twenty-one".