128199366193 has 2 divisors, whose sum is σ = 128199366194. Its totient is φ = 128199366192.

The previous prime is 128199366143. The next prime is 128199366199. The reversal of 128199366193 is 391663991821.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 126329063184 + 1870303009 = 355428^2 + 43247^2 .

It is a cyclic number.

It is not a de Polignac number, because 128199366193 - 2¹⁷ = 128199235121 is a prime.

It is a super-2 number, since 2×128199366193² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (128199366199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64099683096 + 64099683097.

It is an arithmetic number, because the mean of its divisors is an integer number (64099683097).

Almost surely, 2^128199366193 is an apocalyptic number.

It is an amenable number.

128199366193 is a deficient number, since it is larger than the sum of its proper divisors (1).

128199366193 is an equidigital number, since it uses as much as digits as its factorization.

128199366193 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3779136, while the sum is 58.

The spelling of 128199366193 in words is "one hundred twenty-eight billion, one hundred ninety-nine million, three hundred sixty-six thousand, one hundred ninety-three".