728120550656 has 36 divisors (see below), whose sum is σ = 1454195068032. Its totient is φ = 363860338176.

The previous prime is 728120550653. The next prime is 728120550673. The reversal of 728120550656 is 656055021827.

It is a self number, because there is not a number n which added to its sum of digits gives 728120550656.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728120550653) 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, 313406 + ... + 1246781.

Almost surely, 2^728120550656 is an apocalyptic number.

It is an amenable number.

728120550656 is a deficient number, since it is larger than the sum of its proper divisors (726074517376).

728120550656 is a wasteful number, since it uses less digits than its factorization.

728120550656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1562026 (or 1562012 counting only the distinct ones).

The product of its (nonzero) digits is 1008000, while the sum is 47.

The spelling of 728120550656 in words is "seven hundred twenty-eight billion, one hundred twenty million, five hundred fifty thousand, six hundred fifty-six".