128080740269 has 2 divisors, whose sum is σ = 128080740270. Its totient is φ = 128080740268.

The previous prime is 128080740257. The next prime is 128080740311. The reversal of 128080740269 is 962047080821.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127922106244 + 158634025 = 357662^2 + 12595^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128080740269 is a prime.

It is a super-2 number, since 2×128080740269² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128080740239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64040370134 + 64040370135.

It is an arithmetic number, because the mean of its divisors is an integer number (64040370135).

Almost surely, 2^128080740269 is an apocalyptic number.

It is an amenable number.

128080740269 is a deficient number, since it is larger than the sum of its proper divisors (1).

128080740269 is an equidigital number, since it uses as much as digits as its factorization.

128080740269 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 387072, while the sum is 47.

The spelling of 128080740269 in words is "one hundred twenty-eight billion, eighty million, seven hundred forty thousand, two hundred sixty-nine".