128023598849 has 2 divisors, whose sum is σ = 128023598850. Its totient is φ = 128023598848.

The previous prime is 128023598819. The next prime is 128023598851. The reversal of 128023598849 is 948895320821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 114967108624 + 13056490225 = 339068^2 + 114265^2 .

It is a cyclic number.

It is not a de Polignac number, because 128023598849 - 2²⁴ = 128006821633 is a prime.

Together with 128023598851, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (128023598819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64011799424 + 64011799425.

It is an arithmetic number, because the mean of its divisors is an integer number (64011799425).

Almost surely, 2^128023598849 is an apocalyptic number.

It is an amenable number.

128023598849 is a deficient number, since it is larger than the sum of its proper divisors (1).

128023598849 is an equidigital number, since it uses as much as digits as its factorization.

128023598849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9953280, while the sum is 59.

The spelling of 128023598849 in words is "one hundred twenty-eight billion, twenty-three million, five hundred ninety-eight thousand, eight hundred forty-nine".