128784804374393 has 4 divisors (see below), whose sum is σ = 128784838131600. Its totient is φ = 128784770617188.

The previous prime is 128784804374383. The next prime is 128784804374503. The reversal of 128784804374393 is 393473408487821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 128784804374393 - 2²⁰ = 128784803325817 is a prime.

It is a super-2 number, since 2×128784804374393² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128784804374323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10301843 + ... + 19070856.

It is an arithmetic number, because the mean of its divisors is an integer number (32196209532900).

Almost surely, 2^{128784804374393} is an apocalyptic number.

It is an amenable number.

128784804374393 is a deficient number, since it is larger than the sum of its proper divisors (33757207).

128784804374393 is an equidigital number, since it uses as much as digits as its factorization.

128784804374393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33757206.

The product of its (nonzero) digits is 780337152, while the sum is 71.

The spelling of 128784804374393 in words is "one hundred twenty-eight trillion, seven hundred eighty-four billion, eight hundred four million, three hundred seventy-four thousand, three hundred ninety-three".