67251820193 has 2 divisors, whose sum is σ = 67251820194. Its totient is φ = 67251820192.

The previous prime is 67251820183. The next prime is 67251820199. The reversal of 67251820193 is 39102815276.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64405811089 + 2846009104 = 253783^2 + 53348^2 .

It is a cyclic number.

It is not a de Polignac number, because 67251820193 - 2²⁰ = 67250771617 is a prime.

It is not a weakly prime, because it can be changed into another prime (67251820199) by changing a digit.

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 as a sum of consecutive naturals, namely, 33625910096 + 33625910097.

It is an arithmetic number, because the mean of its divisors is an integer number (33625910097).

Almost surely, 2^67251820193 is an apocalyptic number.

It is an amenable number.

67251820193 is a deficient number, since it is larger than the sum of its proper divisors (1).

67251820193 is an equidigital number, since it uses as much as digits as its factorization.

67251820193 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 181440, while the sum is 44.

The spelling of 67251820193 in words is "sixty-seven billion, two hundred fifty-one million, eight hundred twenty thousand, one hundred ninety-three".