728581879645 has 8 divisors (see below), whose sum is σ = 874892620800. Its totient is φ = 582469260240.

The previous prime is 728581879643. The next prime is 728581879651. The reversal of 728581879645 is 546978185827.

It is a happy number.

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

It is not a de Polignac number, because 728581879645 - 2¹ = 728581879643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728581879643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49522345 + ... + 49537054.

It is an arithmetic number, because the mean of its divisors is an integer number (109361577600).

Almost surely, 2^728581879645 is an apocalyptic number.

It is an amenable number.

728581879645 is a deficient number, since it is larger than the sum of its proper divisors (146310741155).

728581879645 is a wasteful number, since it uses less digits than its factorization.

728581879645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99060875.

The product of its digits is 270950400, while the sum is 70.

The spelling of 728581879645 in words is "seven hundred twenty-eight billion, five hundred eighty-one million, eight hundred seventy-nine thousand, six hundred forty-five".