728518329733 has 4 divisors (see below), whose sum is σ = 729053612748. Its totient is φ = 727983046720.

The previous prime is 728518329689. The next prime is 728518329743. The reversal of 728518329733 is 337923815827.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 192859748964 + 535658580769 = 439158^2 + 731887^2 .

It is a cyclic number.

It is not a de Polignac number, because 728518329733 - 2²⁵ = 728484775301 is a prime.

It is a super-2 number, since 2×728518329733² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728518329743) 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 3 ways as a sum of consecutive naturals, for example, 267639466 + ... + 267642187.

It is an arithmetic number, because the mean of its divisors is an integer number (182263403187).

Almost surely, 2^728518329733 is an apocalyptic number.

It is an amenable number.

728518329733 is a deficient number, since it is larger than the sum of its proper divisors (535283015).

728518329733 is a wasteful number, since it uses less digits than its factorization.

728518329733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535283014.

The product of its digits is 15240960, while the sum is 58.

The spelling of 728518329733 in words is "seven hundred twenty-eight billion, five hundred eighteen million, three hundred twenty-nine thousand, seven hundred thirty-three".