444309428261 has 2 divisors, whose sum is σ = 444309428262. Its totient is φ = 444309428260.

The previous prime is 444309428249. The next prime is 444309428287. The reversal of 444309428261 is 162824903444.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 254501079361 + 189808348900 = 504481^2 + 435670^2 .

It is a cyclic number.

It is not a de Polignac number, because 444309428261 - 2⁶ = 444309428197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (444309428561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222154714130 + 222154714131.

It is an arithmetic number, because the mean of its divisors is an integer number (222154714131).

Almost surely, 2^444309428261 is an apocalyptic number.

It is an amenable number.

444309428261 is a deficient number, since it is larger than the sum of its proper divisors (1).

444309428261 is an equidigital number, since it uses as much as digits as its factorization.

444309428261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1327104, while the sum is 47.

The spelling of 444309428261 in words is "four hundred forty-four billion, three hundred nine million, four hundred twenty-eight thousand, two hundred sixty-one".