449185216561 has 4 divisors (see below), whose sum is σ = 459631384432. Its totient is φ = 438739048692.

The previous prime is 449185216547. The next prime is 449185216657. The reversal of 449185216561 is 165612581944.

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 449185216561 - 2³³ = 440595281969 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 449185216499 and 449185216508.

It is not an unprimeable number, because it can be changed into a prime (449185216511) 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 3 ways as a sum of consecutive naturals, for example, 5223083871 + ... + 5223083956.

It is an arithmetic number, because the mean of its divisors is an integer number (114907846108).

Almost surely, 2^449185216561 is an apocalyptic number.

It is an amenable number.

449185216561 is a deficient number, since it is larger than the sum of its proper divisors (10446167871).

449185216561 is a wasteful number, since it uses less digits than its factorization.

449185216561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10446167870.

The product of its digits is 2073600, while the sum is 52.

The spelling of 449185216561 in words is "four hundred forty-nine billion, one hundred eighty-five million, two hundred sixteen thousand, five hundred sixty-one".