128790739169 has 2 divisors, whose sum is σ = 128790739170. Its totient is φ = 128790739168.

The previous prime is 128790739153. The next prime is 128790739219. The reversal of 128790739169 is 961937097821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119707696144 + 9083043025 = 345988^2 + 95305^2 .

It is a cyclic number.

It is not a de Polignac number, because 128790739169 - 2⁴ = 128790739153 is a prime.

It is a super-2 number, since 2×128790739169² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (128790739139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64395369584 + 64395369585.

It is an arithmetic number, because the mean of its divisors is an integer number (64395369585).

Almost surely, 2^128790739169 is an apocalyptic number.

It is an amenable number.

128790739169 is a deficient number, since it is larger than the sum of its proper divisors (1).

128790739169 is an equidigital number, since it uses as much as digits as its factorization.

128790739169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10287648, while the sum is 62.

The spelling of 128790739169 in words is "one hundred twenty-eight billion, seven hundred ninety million, seven hundred thirty-nine thousand, one hundred sixty-nine".