449915778719 has 4 divisors (see below), whose sum is σ = 490817213160. Its totient is φ = 409014344280.

The previous prime is 449915778701. The next prime is 449915778737. The reversal of 449915778719 is 917877519944.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (449915778701) and next prime (449915778737).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-449915778719 is a prime.

It is a super-2 number, since 2×449915778719² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (449915778779) 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, 20450717204 + ... + 20450717225.

It is an arithmetic number, because the mean of its divisors is an integer number (122704303290).

Almost surely, 2^449915778719 is an apocalyptic number.

449915778719 is a deficient number, since it is larger than the sum of its proper divisors (40901434441).

449915778719 is a wasteful number, since it uses less digits than its factorization.

449915778719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40901434440.

The product of its digits is 160030080, while the sum is 71.

The spelling of 449915778719 in words is "four hundred forty-nine billion, nine hundred fifteen million, seven hundred seventy-eight thousand, seven hundred nineteen".