128034577775681 has 2 divisors, whose sum is σ = 128034577775682. Its totient is φ = 128034577775680.

The previous prime is 128034577775623. The next prime is 128034577775807. The reversal of 128034577775681 is 186577775430821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 92463898114225 + 35570679661456 = 9615815^2 + 5964116^2 .

It is an emirp because it is prime and its reverse (186577775430821) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128034577775681 is a prime.

It is a super-2 number, since 2×128034577775681² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (128034577475681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64017288887840 + 64017288887841.

It is an arithmetic number, because the mean of its divisors is an integer number (64017288887841).

Almost surely, 2^{128034577775681} is an apocalyptic number.

It is an amenable number.

128034577775681 is a deficient number, since it is larger than the sum of its proper divisors (1).

128034577775681 is an equidigital number, since it uses as much as digits as its factorization.

128034577775681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 553190400, while the sum is 71.

The spelling of 128034577775681 in words is "one hundred twenty-eight trillion, thirty-four billion, five hundred seventy-seven million, seven hundred seventy-five thousand, six hundred eighty-one".