225640785230401 has 2 divisors, whose sum is σ = 225640785230402. Its totient is φ = 225640785230400.

The previous prime is 225640785230363. The next prime is 225640785230503. The reversal of 225640785230401 is 104032587046522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 225619145349376 + 21639881025 = 15020624^2 + 147105^2 .

It is a cyclic number.

It is not a de Polignac number, because 225640785230401 - 2⁹ = 225640785229889 is a prime.

It is not a weakly prime, because it can be changed into another prime (225640785234401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112820392615200 + 112820392615201.

It is an arithmetic number, because the mean of its divisors is an integer number (112820392615201).

Almost surely, 2^{225640785230401} is an apocalyptic number.

It is an amenable number.

225640785230401 is a deficient number, since it is larger than the sum of its proper divisors (1).

225640785230401 is an equidigital number, since it uses as much as digits as its factorization.

225640785230401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3225600, while the sum is 49.

The spelling of 225640785230401 in words is "two hundred twenty-five trillion, six hundred forty billion, seven hundred eighty-five million, two hundred thirty thousand, four hundred one".