449993666761 has 2 divisors, whose sum is σ = 449993666762. Its totient is φ = 449993666760.

The previous prime is 449993666737. The next prime is 449993666833. The reversal of 449993666761 is 167666399944.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 401980092361 + 48013574400 = 634019^2 + 219120^2 .

It is a cyclic number.

It is not a de Polignac number, because 449993666761 - 2⁵ = 449993666729 is a prime.

It is a super-2 number, since 2×449993666761² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (449993666261) 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 as a sum of consecutive naturals, namely, 224996833380 + 224996833381.

It is an arithmetic number, because the mean of its divisors is an integer number (224996833381).

Almost surely, 2^449993666761 is an apocalyptic number.

It is an amenable number.

449993666761 is a deficient number, since it is larger than the sum of its proper divisors (1).

449993666761 is an equidigital number, since it uses as much as digits as its factorization.

449993666761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 317447424, while the sum is 70.

The spelling of 449993666761 in words is "four hundred forty-nine billion, nine hundred ninety-three million, six hundred sixty-six thousand, seven hundred sixty-one".