449605881819 has 10 divisors (see below), whose sum is σ = 671633477900. Its totient is φ = 299737254492.

The previous prime is 449605881817. The next prime is 449605881841. The reversal of 449605881819 is 918188506944.

449605881819 is a `hidden beast` number, since 4 + 4 + 9 + 605 + 8 + 8 + 1 + 8 + 19 = 666.

It is not a de Polignac number, because 449605881819 - 2¹ = 449605881817 is a prime.

It is a super-2 number, since 2×449605881819² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (449605881817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2775344869 + ... + 2775345030.

It is an arithmetic number, because the mean of its divisors is an integer number (67163347790).

Almost surely, 2^449605881819 is an apocalyptic number.

449605881819 is a deficient number, since it is larger than the sum of its proper divisors (222027596081).

449605881819 is an equidigital number, since it uses as much as digits as its factorization.

449605881819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5550689911 (or 5550689902 counting only the distinct ones).

The product of its (nonzero) digits is 19906560, while the sum is 63.

The spelling of 449605881819 in words is "four hundred forty-nine billion, six hundred five million, eight hundred eighty-one thousand, eight hundred nineteen".