441520406861 has 2 divisors, whose sum is σ = 441520406862. Its totient is φ = 441520406860.

The previous prime is 441520406857. The next prime is 441520406891. The reversal of 441520406861 is 168604025144.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 430874088100 + 10646318761 = 656410^2 + 103181^2 .

It is a cyclic number.

It is not a de Polignac number, because 441520406861 - 2² = 441520406857 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (441520406891) 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, 220760203430 + 220760203431.

It is an arithmetic number, because the mean of its divisors is an integer number (220760203431).

Almost surely, 2^441520406861 is an apocalyptic number.

It is an amenable number.

441520406861 is a deficient number, since it is larger than the sum of its proper divisors (1).

441520406861 is an equidigital number, since it uses as much as digits as its factorization.

441520406861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 184320, while the sum is 41.

The spelling of 441520406861 in words is "four hundred forty-one billion, five hundred twenty million, four hundred six thousand, eight hundred sixty-one".