128478875205 has 8 divisors (see below), whose sum is σ = 205566200352. Its totient is φ = 68522066768.

The previous prime is 128478875201. The next prime is 128478875207. The reversal of 128478875205 is 502578874821.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 128478875205 - 2² = 128478875201 is a prime.

It is a super-3 number, since 3×128478875205³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128478875201) 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 7 ways as a sum of consecutive naturals, for example, 4282629159 + ... + 4282629188.

It is an arithmetic number, because the mean of its divisors is an integer number (25695775044).

Almost surely, 2^128478875205 is an apocalyptic number.

128478875205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

128478875205 is a deficient number, since it is larger than the sum of its proper divisors (77087325147).

128478875205 is an equidigital number, since it uses as much as digits as its factorization.

128478875205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8565258355.

The product of its (nonzero) digits is 10035200, while the sum is 57.

The spelling of 128478875205 in words is "one hundred twenty-eight billion, four hundred seventy-eight million, eight hundred seventy-five thousand, two hundred five".