449317784251 has 24 divisors (see below), whose sum is σ = 549061437600. Its totient is φ = 365912249472.

The previous prime is 449317784207. The next prime is 449317784369. The reversal of 449317784251 is 152487713944.

It is a happy number.

It is not a de Polignac number, because 449317784251 - 2¹¹ = 449317782203 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 449317784192 and 449317784201.

It is not an unprimeable number, because it can be changed into a prime (449317784551) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1169946 + ... + 1505791.

It is an arithmetic number, because the mean of its divisors is an integer number (22877559900).

Almost surely, 2^449317784251 is an apocalyptic number.

449317784251 is a deficient number, since it is larger than the sum of its proper divisors (99743653349).

449317784251 is a wasteful number, since it uses less digits than its factorization.

449317784251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2675923 (or 2675916 counting only the distinct ones).

The product of its digits is 6773760, while the sum is 55.

The spelling of 449317784251 in words is "four hundred forty-nine billion, three hundred seventeen million, seven hundred eighty-four thousand, two hundred fifty-one".