444400004861 has 2 divisors, whose sum is σ = 444400004862. Its totient is φ = 444400004860.

The previous prime is 444400004857. The next prime is 444400004863. The reversal of 444400004861 is 168400004444.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 373297782361 + 71102222500 = 610981^2 + 266650^2 .

It is a cyclic number.

It is not a de Polignac number, because 444400004861 - 2² = 444400004857 is a prime.

It is a Sophie Germain prime.

Together with 444400004863, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (444400004863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222200002430 + 222200002431.

It is an arithmetic number, because the mean of its divisors is an integer number (222200002431).

Almost surely, 2^444400004861 is an apocalyptic number.

It is an amenable number.

444400004861 is a deficient number, since it is larger than the sum of its proper divisors (1).

444400004861 is an equidigital number, since it uses as much as digits as its factorization.

444400004861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 49152, while the sum is 35.

The spelling of 444400004861 in words is "four hundred forty-four billion, four hundred million, four thousand, eight hundred sixty-one".