445163561 has 4 divisors (see below), whose sum is σ = 445218900. Its totient is φ = 445108224.

The previous prime is 445163533. The next prime is 445163569. The reversal of 445163561 is 165361544.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 307335961 + 137827600 = 17531^2 + 11740^2 .

It is a cyclic number.

It is not a de Polignac number, because 445163561 - 2⁶ = 445163497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (445163569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13016 + ... + 32553.

It is an arithmetic number, because the mean of its divisors is an integer number (111304725).

Almost surely, 2^445163561 is an apocalyptic number.

It is an amenable number.

445163561 is a deficient number, since it is larger than the sum of its proper divisors (55339).

445163561 is an equidigital number, since it uses as much as digits as its factorization.

445163561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55338.

The product of its digits is 43200, while the sum is 35.

The square root of 445163561 is about 21098.8995210651. The cubic root of 445163561 is about 763.5541980631.

The spelling of 445163561 in words is "four hundred forty-five million, one hundred sixty-three thousand, five hundred sixty-one".