128912177165 has 16 divisors (see below), whose sum is σ = 164972687040. Its totient is φ = 96364980480.

The previous prime is 128912177129. The next prime is 128912177167. The reversal of 128912177165 is 561771219821.

It is not a de Polignac number, because 128912177165 - 2¹² = 128912173069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128912177167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5443631 + ... + 5467260.

It is an arithmetic number, because the mean of its divisors is an integer number (10310792940).

Almost surely, 2^128912177165 is an apocalyptic number.

It is an amenable number.

128912177165 is a deficient number, since it is larger than the sum of its proper divisors (36060509875).

128912177165 is a wasteful number, since it uses less digits than its factorization.

128912177165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10911052.

The product of its digits is 423360, while the sum is 50.

The spelling of 128912177165 in words is "one hundred twenty-eight billion, nine hundred twelve million, one hundred seventy-seven thousand, one hundred sixty-five".