445405561 has 4 divisors (see below), whose sum is σ = 445709824. Its totient is φ = 445101300.

The previous prime is 445405547. The next prime is 445405589. The reversal of 445405561 is 165504544.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 445405561 - 2⁵ = 445405529 is a prime.

It is a super-2 number, since 2×445405561² = 396772227539449442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (445405531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 149925 + ... + 152866.

It is an arithmetic number, because the mean of its divisors is an integer number (111427456).

Almost surely, 2^445405561 is an apocalyptic number.

It is an amenable number.

445405561 is a deficient number, since it is larger than the sum of its proper divisors (304263).

445405561 is a wasteful number, since it uses less digits than its factorization.

445405561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304262.

The product of its (nonzero) digits is 48000, while the sum is 34.

The square root of 445405561 is about 21104.6336381374. The cubic root of 445405561 is about 763.6925342155.

The spelling of 445405561 in words is "four hundred forty-five million, four hundred five thousand, five hundred sixty-one".