128027540344657 has 2 divisors, whose sum is σ = 128027540344658. Its totient is φ = 128027540344656.

The previous prime is 128027540344637. The next prime is 128027540344727. The reversal of 128027540344657 is 756443045720821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111055851196416 + 16971689148241 = 10538304^2 + 4119671^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128027540344657 is a prime.

It is not a weakly prime, because it can be changed into another prime (128027540344637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64013770172328 + 64013770172329.

It is an arithmetic number, because the mean of its divisors is an integer number (64013770172329).

Almost surely, 2^{128027540344657} is an apocalyptic number.

It is an amenable number.

128027540344657 is a deficient number, since it is larger than the sum of its proper divisors (1).

128027540344657 is an equidigital number, since it uses as much as digits as its factorization.

128027540344657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45158400, while the sum is 58.

The spelling of 128027540344657 in words is "one hundred twenty-eight trillion, twenty-seven billion, five hundred forty million, three hundred forty-four thousand, six hundred fifty-seven".