728837680616 has 8 divisors (see below), whose sum is σ = 1366570651170. Its totient is φ = 364418840304.

The previous prime is 728837680609. The next prime is 728837680643. The reversal of 728837680616 is 616086738827.

728837680616 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 695132392516 + 33705288100 = 833746^2 + 183590^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45552355031 + ... + 45552355046.

Almost surely, 2^728837680616 is an apocalyptic number.

It is an amenable number.

728837680616 is a deficient number, since it is larger than the sum of its proper divisors (637732970554).

728837680616 is a wasteful number, since it uses less digits than its factorization.

728837680616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91104710083 (or 91104710079 counting only the distinct ones).

The product of its (nonzero) digits is 32514048, while the sum is 62.

The spelling of 728837680616 in words is "seven hundred twenty-eight billion, eight hundred thirty-seven million, six hundred eighty thousand, six hundred sixteen".