67944455443 has 2 divisors, whose sum is σ = 67944455444. Its totient is φ = 67944455442.

The previous prime is 67944455393. The next prime is 67944455473. The reversal of 67944455443 is 34455444976.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67944455443 is a prime.

It is not a weakly prime, because it can be changed into another prime (67944455473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33972227721 + 33972227722.

It is an arithmetic number, because the mean of its divisors is an integer number (33972227722).

Almost surely, 2^67944455443 is an apocalyptic number.

67944455443 is a deficient number, since it is larger than the sum of its proper divisors (1).

67944455443 is an equidigital number, since it uses as much as digits as its factorization.

67944455443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29030400, while the sum is 55.

The spelling of 67944455443 in words is "sixty-seven billion, nine hundred forty-four million, four hundred fifty-five thousand, four hundred forty-three".