445545545 has 4 divisors (see below), whose sum is σ = 534654660. Its totient is φ = 356436432.

The previous prime is 445545533. The next prime is 445545587. The reversal of 445545545 is 545545544.

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 125171344 + 320374201 = 11188^2 + 17899^2 .

It is a cyclic number.

It is not a de Polignac number, because 445545545 - 2¹² = 445541449 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44554550 + ... + 44554559.

It is an arithmetic number, because the mean of its divisors is an integer number (133663665).

Almost surely, 2^445545545 is an apocalyptic number.

It is an amenable number.

445545545 is a deficient number, since it is larger than the sum of its proper divisors (89109115).

445545545 is an equidigital number, since it uses as much as digits as its factorization.

445545545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89109114.

The product of its digits is 800000, while the sum is 41.

The square root of 445545545 is about 21107.9498057012. The cubic root of 445545545 is about 763.7725313743.

Subtracting 445545545 from its reverse (545545544), we obtain a palindrome (99999999).

The spelling of 445545545 in words is "four hundred forty-five million, five hundred forty-five thousand, five hundred forty-five".