805504368728 has 64 divisors (see below), whose sum is σ = 1604197785600. Its totient is φ = 378674075520.

The previous prime is 805504368709. The next prime is 805504368731. The reversal of 805504368728 is 827863405508.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 732593 + ... + 1465503.

It is an arithmetic number, because the mean of its divisors is an integer number (25065590400).

Almost surely, 2^805504368728 is an apocalyptic number.

It is an amenable number.

805504368728 is a deficient number, since it is larger than the sum of its proper divisors (798693416872).

805504368728 is a wasteful number, since it uses less digits than its factorization.

805504368728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 733080 (or 733076 counting only the distinct ones).

The product of its (nonzero) digits is 12902400, while the sum is 56.

The spelling of 805504368728 in words is "eight hundred five billion, five hundred four million, three hundred sixty-eight thousand, seven hundred twenty-eight".