720716617028 has 12 divisors (see below), whose sum is σ = 1279018222272. Its totient is φ = 355282839240.

The previous prime is 720716617021. The next prime is 720716617043. The reversal of 720716617028 is 820716617027.

It is a happy number.

720716617028 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (720716617021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1268867000 + ... + 1268867567.

It is an arithmetic number, because the mean of its divisors is an integer number (106584851856).

Almost surely, 2^720716617028 is an apocalyptic number.

It is an amenable number.

720716617028 is a deficient number, since it is larger than the sum of its proper divisors (558301605244).

720716617028 is a wasteful number, since it uses less digits than its factorization.

720716617028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2537734642 (or 2537734640 counting only the distinct ones).

The product of its (nonzero) digits is 395136, while the sum is 47.

Subtracting 720716617028 from its reverse (820716617027), we obtain a palindrome (99999999999).

The spelling of 720716617028 in words is "seven hundred twenty billion, seven hundred sixteen million, six hundred seventeen thousand, twenty-eight".