225661887377 has 2 divisors, whose sum is σ = 225661887378. Its totient is φ = 225661887376.

The previous prime is 225661887349. The next prime is 225661887401. The reversal of 225661887377 is 773788166522.

225661887377 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 135983200081 + 89678687296 = 368759^2 + 299464^2 .

It is a cyclic number.

It is not a de Polignac number, because 225661887377 - 2¹² = 225661883281 is a prime.

It is not a weakly prime, because it can be changed into another prime (225661887317) 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, 112830943688 + 112830943689.

It is an arithmetic number, because the mean of its divisors is an integer number (112830943689).

Almost surely, 2^225661887377 is an apocalyptic number.

It is an amenable number.

225661887377 is a deficient number, since it is larger than the sum of its proper divisors (1).

225661887377 is an equidigital number, since it uses as much as digits as its factorization.

225661887377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47416320, while the sum is 62.

The spelling of 225661887377 in words is "two hundred twenty-five billion, six hundred sixty-one million, eight hundred eighty-seven thousand, three hundred seventy-seven".