728425588891 has 64 divisors (see below), whose sum is σ = 1030660485120. Its totient is φ = 495807557760.

The previous prime is 728425588889. The next prime is 728425588903. The reversal of 728425588891 is 198885524827.

It is a cyclic number.

It is not a de Polignac number, because 728425588891 - 2¹ = 728425588889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (728425588811) 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 63 ways as a sum of consecutive naturals, for example, 17229120 + ... + 17271346.

It is an arithmetic number, because the mean of its divisors is an integer number (16104070080).

Almost surely, 2^728425588891 is an apocalyptic number.

728425588891 is a deficient number, since it is larger than the sum of its proper divisors (302234896229).

728425588891 is a wasteful number, since it uses less digits than its factorization.

728425588891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43184.

The product of its digits is 103219200, while the sum is 67.

The spelling of 728425588891 in words is "seven hundred twenty-eight billion, four hundred twenty-five million, five hundred eighty-eight thousand, eight hundred ninety-one".