128223793177 has 2 divisors, whose sum is σ = 128223793178. Its totient is φ = 128223793176.

The previous prime is 128223793169. The next prime is 128223793193. The reversal of 128223793177 is 771397322821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102543410176 + 25680383001 = 320224^2 + 160251^2 .

It is a cyclic number.

It is not a de Polignac number, because 128223793177 - 2³ = 128223793169 is a prime.

It is a super-2 number, since 2×128223793177² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (128223793127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64111896588 + 64111896589.

It is an arithmetic number, because the mean of its divisors is an integer number (64111896589).

Almost surely, 2^128223793177 is an apocalyptic number.

It is an amenable number.

128223793177 is a deficient number, since it is larger than the sum of its proper divisors (1).

128223793177 is an equidigital number, since it uses as much as digits as its factorization.

128223793177 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1778112, while the sum is 52.

The spelling of 128223793177 in words is "one hundred twenty-eight billion, two hundred twenty-three million, seven hundred ninety-three thousand, one hundred seventy-seven".