128670308809 has 16 divisors (see below), whose sum is σ = 150686490240. Its totient is φ = 107570131200.

The previous prime is 128670308801. The next prime is 128670308821. The reversal of 128670308809 is 908803076821.

It is not a de Polignac number, because 128670308809 - 2³ = 128670308801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128670308801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93904 + ... + 515905.

It is an arithmetic number, because the mean of its divisors is an integer number (9417905640).

Almost surely, 2^128670308809 is an apocalyptic number.

It is an amenable number.

128670308809 is a deficient number, since it is larger than the sum of its proper divisors (22016181431).

128670308809 is an equidigital number, since it uses as much as digits as its factorization.

128670308809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610560.

The product of its (nonzero) digits is 1161216, while the sum is 52.

The spelling of 128670308809 in words is "one hundred twenty-eight billion, six hundred seventy million, three hundred eight thousand, eight hundred nine".