128195754267 has 18 divisors (see below), whose sum is σ = 198840964404. Its totient is φ = 73252236120.

The previous prime is 128195754263. The next prime is 128195754277. The reversal of 128195754267 is 762457591821.

It is not a de Polignac number, because 128195754267 - 2² = 128195754263 is a prime.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (128195754263) 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 17 ways as a sum of consecutive naturals, for example, 4326292 + ... + 4355822.

Almost surely, 2^128195754267 is an apocalyptic number.

128195754267 is a deficient number, since it is larger than the sum of its proper divisors (70645210137).

128195754267 is an frugal number, since it uses more digits than its factorization.

128195754267 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59079 (or 29541 counting only the distinct ones).

The product of its digits is 8467200, while the sum is 57.

The spelling of 128195754267 in words is "one hundred twenty-eight billion, one hundred ninety-five million, seven hundred fifty-four thousand, two hundred sixty-seven".