728604617225 has 6 divisors (see below), whose sum is σ = 903469725390. Its totient is φ = 582883693760.

The previous prime is 728604617203. The next prime is 728604617267. The reversal of 728604617225 is 522716406827.

It can be written as a sum of positive squares in 3 ways, for example, as 6898299136 + 721706318089 = 83056^2 + 849533^2 .

It is not a de Polignac number, because 728604617225 - 2¹⁸ = 728604355081 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14572092320 + ... + 14572092369.

It is an arithmetic number, because the mean of its divisors is an integer number (150578287565).

Almost surely, 2^728604617225 is an apocalyptic number.

It is an amenable number.

728604617225 is a deficient number, since it is larger than the sum of its proper divisors (174865108165).

728604617225 is a wasteful number, since it uses less digits than its factorization.

728604617225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29144184699 (or 29144184694 counting only the distinct ones).

The product of its (nonzero) digits is 2257920, while the sum is 50.

The spelling of 728604617225 in words is "seven hundred twenty-eight billion, six hundred four million, six hundred seventeen thousand, two hundred twenty-five".