128080740257 has 2 divisors, whose sum is σ = 128080740258. Its totient is φ = 128080740256.

The previous prime is 128080740239. The next prime is 128080740269. The reversal of 128080740257 is 752047080821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 128048749921 + 31990336 = 357839^2 + 5656^2 .

It is a cyclic number.

It is not a de Polignac number, because 128080740257 - 2¹⁶ = 128080674721 is a prime.

It is a super-2 number, since 2×128080740257² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (128080740217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64040370128 + 64040370129.

It is an arithmetic number, because the mean of its divisors is an integer number (64040370129).

Almost surely, 2^128080740257 is an apocalyptic number.

It is an amenable number.

128080740257 is a deficient number, since it is larger than the sum of its proper divisors (1).

128080740257 is an equidigital number, since it uses as much as digits as its factorization.

128080740257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 250880, while the sum is 44.

The spelling of 128080740257 in words is "one hundred twenty-eight billion, eighty million, seven hundred forty thousand, two hundred fifty-seven".