1128944889257 has 2 divisors, whose sum is σ = 1128944889258. Its totient is φ = 1128944889256.

The previous prime is 1128944889229. The next prime is 1128944889329. The reversal of 1128944889257 is 7529884498211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 778778010256 + 350166879001 = 882484^2 + 591749^2 .

It is a cyclic number.

It is not a de Polignac number, because 1128944889257 - 2³² = 1124649921961 is a prime.

It is not a weakly prime, because it can be changed into another prime (1128944889557) 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, 564472444628 + 564472444629.

It is an arithmetic number, because the mean of its divisors is an integer number (564472444629).

Almost surely, 2^{1128944889257} is an apocalyptic number.

It is an amenable number.

1128944889257 is a deficient number, since it is larger than the sum of its proper divisors (1).

1128944889257 is an equidigital number, since it uses as much as digits as its factorization.

1128944889257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 92897280, while the sum is 68.

The spelling of 1128944889257 in words is "one trillion, one hundred twenty-eight billion, nine hundred forty-four million, eight hundred eighty-nine thousand, two hundred fifty-seven".