128063715442549 has 2 divisors, whose sum is σ = 128063715442550. Its totient is φ = 128063715442548.

The previous prime is 128063715442543. The next prime is 128063715442709. The reversal of 128063715442549 is 945244517360821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 113569133961924 + 14494581480625 = 10656882^2 + 3807175^2 .

It is a cyclic number.

It is not a de Polignac number, because 128063715442549 - 2²¹ = 128063713345397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128063715442543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64031857721274 + 64031857721275.

It is an arithmetic number, because the mean of its divisors is an integer number (64031857721275).

It is a 2-persistent number, because it is pandigital, and so is 2⋅128063715442549 = 256127430885098, but 3⋅128063715442549 = 384191146327647 is not.

Almost surely, 2^{128063715442549} is an apocalyptic number.

It is an amenable number.

128063715442549 is a deficient number, since it is larger than the sum of its proper divisors (1).

128063715442549 is an equidigital number, since it uses as much as digits as its factorization.

128063715442549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 58060800, while the sum is 61.

The spelling of 128063715442549 in words is "one hundred twenty-eight trillion, sixty-three billion, seven hundred fifteen million, four hundred forty-two thousand, five hundred forty-nine".