225720079649 has 2 divisors, whose sum is σ = 225720079650. Its totient is φ = 225720079648.

The previous prime is 225720079639. The next prime is 225720079691. The reversal of 225720079649 is 946970027522.

225720079649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 216285454225 + 9434625424 = 465065^2 + 97132^2 .

It is a cyclic number.

It is not a de Polignac number, because 225720079649 - 2²⁰ = 225719031073 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 225720079649.

It is not a weakly prime, because it can be changed into another prime (225720079619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112860039824 + 112860039825.

It is an arithmetic number, because the mean of its divisors is an integer number (112860039825).

Almost surely, 2^225720079649 is an apocalyptic number.

It is an amenable number.

225720079649 is a deficient number, since it is larger than the sum of its proper divisors (1).

225720079649 is an equidigital number, since it uses as much as digits as its factorization.

225720079649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3810240, while the sum is 53.

The spelling of 225720079649 in words is "two hundred twenty-five billion, seven hundred twenty million, seventy-nine thousand, six hundred forty-nine".