128630889241 has 2 divisors, whose sum is σ = 128630889242. Its totient is φ = 128630889240.

The previous prime is 128630889229. The next prime is 128630889251. The reversal of 128630889241 is 142988036821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 95710415641 + 32920473600 = 309371^2 + 181440^2 .

It is a cyclic number.

It is not a de Polignac number, because 128630889241 - 2¹⁹ = 128630364953 is a prime.

It is not a weakly prime, because it can be changed into another prime (128630889251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64315444620 + 64315444621.

It is an arithmetic number, because the mean of its divisors is an integer number (64315444621).

Almost surely, 2^128630889241 is an apocalyptic number.

It is an amenable number.

128630889241 is a deficient number, since it is larger than the sum of its proper divisors (1).

128630889241 is an equidigital number, since it uses as much as digits as its factorization.

128630889241 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1327104, while the sum is 52.

The spelling of 128630889241 in words is "one hundred twenty-eight billion, six hundred thirty million, eight hundred eighty-nine thousand, two hundred forty-one".