905509728805 has 16 divisors (see below), whose sum is σ = 1255123646784. Its totient is φ = 619814145280.

The previous prime is 905509728787. The next prime is 905509728833. The reversal of 905509728805 is 508827905509.

905509728805 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 905509728805 - 2⁷ = 905509728677 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 905509728805.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 484228867 + ... + 484230736.

It is an arithmetic number, because the mean of its divisors is an integer number (78445227924).

Almost surely, 2^905509728805 is an apocalyptic number.

It is an amenable number.

905509728805 is a deficient number, since it is larger than the sum of its proper divisors (349613917979).

905509728805 is a wasteful number, since it uses less digits than its factorization.

905509728805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 968459636.

The product of its (nonzero) digits is 9072000, while the sum is 58.

The spelling of 905509728805 in words is "nine hundred five billion, five hundred nine million, seven hundred twenty-eight thousand, eight hundred five".