728784712569 has 8 divisors (see below), whose sum is σ = 971762933632. Its totient is φ = 485831483280.

The previous prime is 728784712567. The next prime is 728784712597. The reversal of 728784712569 is 965217487827.

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

It is not a de Polignac number, because 728784712569 - 2¹ = 728784712567 is a prime.

It is a super-2 number, since 2×728784712569² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (728784712561) 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, 6179794 + ... + 6296619.

It is an arithmetic number, because the mean of its divisors is an integer number (121470366704).

Almost surely, 2^728784712569 is an apocalyptic number.

It is an amenable number.

728784712569 is a deficient number, since it is larger than the sum of its proper divisors (242978221063).

728784712569 is a wasteful number, since it uses less digits than its factorization.

728784712569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12495887.

The product of its digits is 94832640, while the sum is 66.

The spelling of 728784712569 in words is "seven hundred twenty-eight billion, seven hundred eighty-four million, seven hundred twelve thousand, five hundred sixty-nine".