67944455393 has 2 divisors, whose sum is σ = 67944455394. Its totient is φ = 67944455392.

The previous prime is 67944455389. The next prime is 67944455443. The reversal of 67944455393 is 39355444976.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67010052769 + 934402624 = 258863^2 + 30568^2 .

It is a cyclic number.

It is not a de Polignac number, because 67944455393 - 2² = 67944455389 is a prime.

It is not a weakly prime, because it can be changed into another prime (67944455333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33972227696 + 33972227697.

It is an arithmetic number, because the mean of its divisors is an integer number (33972227697).

Almost surely, 2^67944455393 is an apocalyptic number.

It is an amenable number.

67944455393 is a deficient number, since it is larger than the sum of its proper divisors (1).

67944455393 is an equidigital number, since it uses as much as digits as its factorization.

67944455393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48988800, while the sum is 59.

The spelling of 67944455393 in words is "sixty-seven billion, nine hundred forty-four million, four hundred fifty-five thousand, three hundred ninety-three".