128706115468499 has 2 divisors, whose sum is σ = 128706115468500. Its totient is φ = 128706115468498.

The previous prime is 128706115468429. The next prime is 128706115468531. The reversal of 128706115468499 is 994864511607821.

It is a strong prime.

It is an emirp because it is prime and its reverse (994864511607821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 128706115468499 - 2²⁴ = 128706098691283 is a prime.

It is a super-2 number, since 2×128706115468499² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (128706115468409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64353057734249 + 64353057734250.

It is an arithmetic number, because the mean of its divisors is an integer number (64353057734250).

Almost surely, 2^{128706115468499} is an apocalyptic number.

128706115468499 is a deficient number, since it is larger than the sum of its proper divisors (1).

128706115468499 is an equidigital number, since it uses as much as digits as its factorization.

128706115468499 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 209018880, while the sum is 71.

The spelling of 128706115468499 in words is "one hundred twenty-eight trillion, seven hundred six billion, one hundred fifteen million, four hundred sixty-eight thousand, four hundred ninety-nine".