128662118187 has 8 divisors (see below), whose sum is σ = 171551677440. Its totient is φ = 85773652200.

The previous prime is 128662118183. The next prime is 128662118209. The reversal of 128662118187 is 781811266821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 128662118187 - 2² = 128662118183 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128662118183) 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 7 ways as a sum of consecutive naturals, for example, 59014 + ... + 510692.

It is an arithmetic number, because the mean of its divisors is an integer number (21443959680).

Almost surely, 2^128662118187 is an apocalyptic number.

128662118187 is a deficient number, since it is larger than the sum of its proper divisors (42889559253).

128662118187 is an equidigital number, since it uses as much as digits as its factorization.

128662118187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 546633.

The product of its digits is 516096, while the sum is 51.

The spelling of 128662118187 in words is "one hundred twenty-eight billion, six hundred sixty-two million, one hundred eighteen thousand, one hundred eighty-seven".