447665670509 has 2 divisors, whose sum is σ = 447665670510. Its totient is φ = 447665670508.

The previous prime is 447665670499. The next prime is 447665670527. The reversal of 447665670509 is 905076566744.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 435032584900 + 12633085609 = 659570^2 + 112397^2 .

It is a cyclic number.

It is not a de Polignac number, because 447665670509 - 2⁴ = 447665670493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (447665670709) 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, 223832835254 + 223832835255.

It is an arithmetic number, because the mean of its divisors is an integer number (223832835255).

Almost surely, 2^447665670509 is an apocalyptic number.

It is an amenable number.

447665670509 is a deficient number, since it is larger than the sum of its proper divisors (1).

447665670509 is an equidigital number, since it uses as much as digits as its factorization.

447665670509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38102400, while the sum is 59.

The spelling of 447665670509 in words is "four hundred forty-seven billion, six hundred sixty-five million, six hundred seventy thousand, five hundred nine".