449739561 has 8 divisors (see below), whose sum is σ = 599757184. Its totient is φ = 299774160.

The previous prime is 449739553. The next prime is 449739581. The reversal of 449739561 is 165937944.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 449739561 - 2³ = 449739553 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 449739561.

It is not an unprimeable number, because it can be changed into a prime (449739581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16791 + ... + 34371.

It is an arithmetic number, because the mean of its divisors is an integer number (74969648).

Almost surely, 2^449739561 is an apocalyptic number.

It is an amenable number.

449739561 is a deficient number, since it is larger than the sum of its proper divisors (150017623).

449739561 is a wasteful number, since it uses less digits than its factorization.

449739561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26111.

The product of its digits is 816480, while the sum is 48.

The square root of 449739561 is about 21207.0639410551. The cubic root of 449739561 is about 766.1615691516.

The spelling of 449739561 in words is "four hundred forty-nine million, seven hundred thirty-nine thousand, five hundred sixty-one".