128891275379 has 4 divisors (see below), whose sum is σ = 128895637176. Its totient is φ = 128886913584.

The previous prime is 128891275361. The next prime is 128891275391. The reversal of 128891275379 is 973572198821.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 128891275379 - 2¹² = 128891271283 is a prime.

It is a super-2 number, since 2×128891275379² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128891475379) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2136269 + ... + 2195774.

It is an arithmetic number, because the mean of its divisors is an integer number (32223909294).

Almost surely, 2^128891275379 is an apocalyptic number.

128891275379 is a deficient number, since it is larger than the sum of its proper divisors (4361797).

128891275379 is an equidigital number, since it uses as much as digits as its factorization.

128891275379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4361796.

The product of its digits is 15240960, while the sum is 62.

The spelling of 128891275379 in words is "one hundred twenty-eight billion, eight hundred ninety-one million, two hundred seventy-five thousand, three hundred seventy-nine".