225656162728 has 8 divisors (see below), whose sum is σ = 423105305130. Its totient is φ = 112828081360.

The previous prime is 225656162701. The next prime is 225656162729. The reversal of 225656162728 is 827261656522.

It can be written as a sum of positive squares in only one way, i.e., 199021269924 + 26634892804 = 446118^2 + 163202^2 .

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

It is not an unprimeable number, because it can be changed into a prime (225656162729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14103510163 + ... + 14103510178.

Almost surely, 2^225656162728 is an apocalyptic number.

It is an amenable number.

225656162728 is a deficient number, since it is larger than the sum of its proper divisors (197449142402).

225656162728 is a wasteful number, since it uses less digits than its factorization.

225656162728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28207020347 (or 28207020343 counting only the distinct ones).

The product of its digits is 4838400, while the sum is 52.

The spelling of 225656162728 in words is "two hundred twenty-five billion, six hundred fifty-six million, one hundred sixty-two thousand, seven hundred twenty-eight".