128027540344727 has 2 divisors, whose sum is σ = 128027540344728. Its totient is φ = 128027540344726.

The previous prime is 128027540344657. The next prime is 128027540344751. The reversal of 128027540344727 is 727443045720821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 128027540344727 - 2¹⁸ = 128027540082583 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128027540344427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64013770172363 + 64013770172364.

It is an arithmetic number, because the mean of its divisors is an integer number (64013770172364).

Almost surely, 2^{128027540344727} is an apocalyptic number.

128027540344727 is a deficient number, since it is larger than the sum of its proper divisors (1).

128027540344727 is an equidigital number, since it uses as much as digits as its factorization.

128027540344727 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21073920, while the sum is 56.

The spelling of 128027540344727 in words is "one hundred twenty-eight trillion, twenty-seven billion, five hundred forty million, three hundred forty-four thousand, seven hundred twenty-seven".