445665171649 has 2 divisors, whose sum is σ = 445665171650. Its totient is φ = 445665171648.

The previous prime is 445665171599. The next prime is 445665171667. The reversal of 445665171649 is 946171566544.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 283604177025 + 162060994624 = 532545^2 + 402568^2 .

It is a cyclic number.

It is not a de Polignac number, because 445665171649 - 2¹⁵ = 445665138881 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 445665171593 and 445665171602.

It is not a weakly prime, because it can be changed into another prime (445665171449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222832585824 + 222832585825.

It is an arithmetic number, because the mean of its divisors is an integer number (222832585825).

Almost surely, 2^445665171649 is an apocalyptic number.

It is an amenable number.

445665171649 is a deficient number, since it is larger than the sum of its proper divisors (1).

445665171649 is an equidigital number, since it uses as much as digits as its factorization.

445665171649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21772800, while the sum is 58.

The spelling of 445665171649 in words is "four hundred forty-five billion, six hundred sixty-five million, one hundred seventy-one thousand, six hundred forty-nine".