449051668281 has 6 divisors (see below), whose sum is σ = 648630187530. Its totient is φ = 299367778848.

The previous prime is 449051668277. The next prime is 449051668283. The reversal of 449051668281 is 182866150944.

449051668281 is a `hidden beast` number, since 4 + 49 + 0 + 516 + 6 + 8 + 2 + 81 = 666.

It can be written as a sum of positive squares in only one way, i.e., 407248185600 + 41803482681 = 638160^2 + 204459^2 .

It is not a de Polignac number, because 449051668281 - 2² = 449051668277 is a prime.

It is a super-2 number, since 2×449051668281² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (449051668283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24947314896 + ... + 24947314913.

It is an arithmetic number, because the mean of its divisors is an integer number (108105031255).

Almost surely, 2^449051668281 is an apocalyptic number.

It is an amenable number.

449051668281 is a deficient number, since it is larger than the sum of its proper divisors (199578519249).

449051668281 is a wasteful number, since it uses less digits than its factorization.

449051668281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49894629815 (or 49894629812 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 54.

The spelling of 449051668281 in words is "four hundred forty-nine billion, fifty-one million, six hundred sixty-eight thousand, two hundred eighty-one".