445541565173 has 2 divisors, whose sum is σ = 445541565174. Its totient is φ = 445541565172.

The previous prime is 445541565061. The next prime is 445541565179. The reversal of 445541565173 is 371565145544.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 437723822449 + 7817742724 = 661607^2 + 88418^2 .

It is a cyclic number.

It is not a de Polignac number, because 445541565173 - 2¹² = 445541561077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (445541565179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222770782586 + 222770782587.

It is an arithmetic number, because the mean of its divisors is an integer number (222770782587).

Almost surely, 2^445541565173 is an apocalyptic number.

It is an amenable number.

445541565173 is a deficient number, since it is larger than the sum of its proper divisors (1).

445541565173 is an equidigital number, since it uses as much as digits as its factorization.

445541565173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5040000, while the sum is 50.

The spelling of 445541565173 in words is "four hundred forty-five billion, five hundred forty-one million, five hundred sixty-five thousand, one hundred seventy-three".