728555959605 has 32 divisors (see below), whose sum is σ = 1185903734400. Its totient is φ = 381830188032.

The previous prime is 728555959531. The next prime is 728555959609. The reversal of 728555959605 is 506959555827.

It is a happy number.

It is not a de Polignac number, because 728555959605 - 2¹³ = 728555951413 is a prime.

It is a Smith number, since the sum of its digits (66) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728555959609) 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 31 ways as a sum of consecutive naturals, for example, 2158761 + ... + 2473329.

It is an arithmetic number, because the mean of its divisors is an integer number (37059491700).

Almost surely, 2^728555959605 is an apocalyptic number.

It is an amenable number.

728555959605 is a deficient number, since it is larger than the sum of its proper divisors (457347774795).

728555959605 is a wasteful number, since it uses less digits than its factorization.

728555959605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317253.

The product of its (nonzero) digits is 170100000, while the sum is 66.

The spelling of 728555959605 in words is "seven hundred twenty-eight billion, five hundred fifty-five million, nine hundred fifty-nine thousand, six hundred five".