728663366827 has 32 divisors (see below), whose sum is σ = 839794231296. Its totient is φ = 625771238400.

The previous prime is 728663366819. The next prime is 728663366887.

728663366827 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 728663366827 - 2³ = 728663366819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (728663366887) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7988158 + ... + 8078860.

It is an arithmetic number, because the mean of its divisors is an integer number (26243569728).

Almost surely, 2^728663366827 is an apocalyptic number.

728663366827 is a deficient number, since it is larger than the sum of its proper divisors (111130864469).

728663366827 is a wasteful number, since it uses less digits than its factorization.

728663366827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91131.

The product of its digits is 146313216, while the sum is 64.

The spelling of 728663366827 in words is "seven hundred twenty-eight billion, six hundred sixty-three million, three hundred sixty-six thousand, eight hundred twenty-seven".