128205676875 has 30 divisors (see below), whose sum is σ = 213633587244. Its totient is φ = 68368092000.

The previous prime is 128205676853. The next prime is 128205676891. The reversal of 128205676875 is 578676502821.

It is not a de Polignac number, because 128205676875 - 2¹⁸ = 128205414731 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 15500241 + ... + 15508509.

Almost surely, 2^128205676875 is an apocalyptic number.

128205676875 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

128205676875 is a deficient number, since it is larger than the sum of its proper divisors (85427910369).

128205676875 is an frugal number, since it uses more digits than its factorization.

128205676875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16561 (or 8277 counting only the distinct ones).

The product of its (nonzero) digits is 11289600, while the sum is 57.

The spelling of 128205676875 in words is "one hundred twenty-eight billion, two hundred five million, six hundred seventy-six thousand, eight hundred seventy-five".