128865195207 has 36 divisors (see below), whose sum is σ = 216556995096. Its totient is φ = 73627596000.

The previous prime is 128865195197. The next prime is 128865195227. The reversal of 128865195207 is 702591568821.

128865195207 is a `hidden beast` number, since 1 + 28 + 86 + 5 + 19 + 520 + 7 = 666.

It is not a de Polignac number, because 128865195207 - 2⁴ = 128865195191 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128865195227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 4617028 + ... + 4644854.

It is an arithmetic number, because the mean of its divisors is an integer number (6015472086).

Almost surely, 2^128865195207 is an apocalyptic number.

128865195207 is a deficient number, since it is larger than the sum of its proper divisors (87691799889).

128865195207 is a wasteful number, since it uses less digits than its factorization.

128865195207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38348 (or 38338 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 54.

The spelling of 128865195207 in words is "one hundred twenty-eight billion, eight hundred sixty-five million, one hundred ninety-five thousand, two hundred seven".