67445344556 has 12 divisors (see below), whose sum is σ = 121836751680. Its totient is φ = 32634844080.

The previous prime is 67445344507. The next prime is 67445344591. The reversal of 67445344556 is 65544354476.

It is a junction number, because it is equal to n+sod(n) for n = 67445344498 and 67445344507.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 271956911 + ... + 271957158.

It is an arithmetic number, because the mean of its divisors is an integer number (10153062640).

Almost surely, 2^67445344556 is an apocalyptic number.

It is an amenable number.

67445344556 is a deficient number, since it is larger than the sum of its proper divisors (54391407124).

67445344556 is a wasteful number, since it uses less digits than its factorization.

67445344556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543914104 (or 543914102 counting only the distinct ones).

The product of its digits is 24192000, while the sum is 53.

The spelling of 67445344556 in words is "sixty-seven billion, four hundred forty-five million, three hundred forty-four thousand, five hundred fifty-six".