728355634464 has 24 divisors (see below), whose sum is σ = 1911933540720. Its totient is φ = 242785211456.

The previous prime is 728355634453. The next prime is 728355634477. The reversal of 728355634464 is 464436553827.

It is a tau number, because it is divible by the number of its divisors (24).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3793518834 + ... + 3793519025.

It is an arithmetic number, because the mean of its divisors is an integer number (79663897530).

Almost surely, 2^728355634464 is an apocalyptic number.

It is an amenable number.

728355634464 is an abundant number, since it is smaller than the sum of its proper divisors (1183577906256).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

728355634464 is a wasteful number, since it uses less digits than its factorization.

728355634464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7587037872 (or 7587037864 counting only the distinct ones).

The product of its digits is 58060800, while the sum is 57.

The spelling of 728355634464 in words is "seven hundred twenty-eight billion, three hundred fifty-five million, six hundred thirty-four thousand, four hundred sixty-four".