68448433509 has 10 divisors (see below), whose sum is σ = 102250129190. Its totient is φ = 45632288952.

The previous prime is 68448433507. The next prime is 68448433511. The reversal of 68448433509 is 90533484486.

68448433509 is a `hidden beast` number, since 6 + 84 + 484 + 33 + 50 + 9 = 666.

It is an interprime number because it is at equal distance from previous prime (68448433507) and next prime (68448433511).

It can be written as a sum of positive squares in only one way, i.e., 64460132100 + 3988301409 = 253890^2 + 63153^2 .

It is not a de Polignac number, because 68448433509 - 2¹ = 68448433507 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68448433507) 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, 422521114 + ... + 422521275.

It is an arithmetic number, because the mean of its divisors is an integer number (10225012919).

Almost surely, 2^68448433509 is an apocalyptic number.

It is an amenable number.

68448433509 is a deficient number, since it is larger than the sum of its proper divisors (33801695681).

68448433509 is an equidigital number, since it uses as much as digits as its factorization.

68448433509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 845042401 (or 845042392 counting only the distinct ones).

The product of its (nonzero) digits is 9953280, while the sum is 54.

The spelling of 68448433509 in words is "sixty-eight billion, four hundred forty-eight million, four hundred thirty-three thousand, five hundred nine".