128876280811189 has 4 divisors (see below), whose sum is σ = 128924785247724. Its totient is φ = 128827776374656.

The previous prime is 128876280811153. The next prime is 128876280811193. The reversal of 128876280811189 is 981118082678821.

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

It can be written as a sum of positive squares in 2 ways, for example, as 54136970675089 + 74739310136100 = 7357783^2 + 8645190^2 .

It is a cyclic number.

It is not a de Polignac number, because 128876280811189 - 2³³ = 128867690876597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128876280815189) 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, 24252214282 + ... + 24252219595.

It is an arithmetic number, because the mean of its divisors is an integer number (32231196311931).

Almost surely, 2^{128876280811189} is an apocalyptic number.

It is an amenable number.

128876280811189 is a deficient number, since it is larger than the sum of its proper divisors (48504436535).

128876280811189 is an equidigital number, since it uses as much as digits as its factorization.

128876280811189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48504436534.

The product of its (nonzero) digits is 49545216, while the sum is 70.

The spelling of 128876280811189 in words is "one hundred twenty-eight trillion, eight hundred seventy-six billion, two hundred eighty million, eight hundred eleven thousand, one hundred eighty-nine".