128942604259727 has 2 divisors, whose sum is σ = 128942604259728. Its totient is φ = 128942604259726.

The previous prime is 128942604259639. The next prime is 128942604259739. The reversal of 128942604259727 is 727952406249821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 128942604259727 - 2²⁸ = 128942335824271 is a prime.

It is a super-2 number, since 2×128942604259727² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128942604259787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64471302129863 + 64471302129864.

It is an arithmetic number, because the mean of its divisors is an integer number (64471302129864).

Almost surely, 2^{128942604259727} is an apocalyptic number.

128942604259727 is a deficient number, since it is larger than the sum of its proper divisors (1).

128942604259727 is an equidigital number, since it uses as much as digits as its factorization.

128942604259727 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 243855360, while the sum is 68.

The spelling of 128942604259727 in words is "one hundred twenty-eight trillion, nine hundred forty-two billion, six hundred four million, two hundred fifty-nine thousand, seven hundred twenty-seven".