128170908363 has 16 divisors (see below), whose sum is σ = 171333135360. Its totient is φ = 85228237536.

The previous prime is 128170908329. The next prime is 128170908367. The reversal of 128170908363 is 363809071821.

It is not a de Polignac number, because 128170908363 - 2²⁰ = 128169859787 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128170908367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1987756 + ... + 2051222.

It is an arithmetic number, because the mean of its divisors is an integer number (10708320960).

Almost surely, 2^128170908363 is an apocalyptic number.

128170908363 is a deficient number, since it is larger than the sum of its proper divisors (43162226997).

128170908363 is a wasteful number, since it uses less digits than its factorization.

128170908363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65186.

The product of its (nonzero) digits is 435456, while the sum is 48.

The spelling of 128170908363 in words is "one hundred twenty-eight billion, one hundred seventy million, nine hundred eight thousand, three hundred sixty-three".