128850810811 has 4 divisors (see below), whose sum is σ = 131592317472. Its totient is φ = 126109304152.

The previous prime is 128850810787. The next prime is 128850810827. The reversal of 128850810811 is 118018058821.

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 128850810811 - 2⁹ = 128850810299 is a prime.

It is a super-2 number, since 2×128850810811² (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 (128850810211) 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 3 ways as a sum of consecutive naturals, for example, 1370753260 + ... + 1370753353.

It is an arithmetic number, because the mean of its divisors is an integer number (32898079368).

Almost surely, 2^128850810811 is an apocalyptic number.

128850810811 is a deficient number, since it is larger than the sum of its proper divisors (2741506661).

128850810811 is an equidigital number, since it uses as much as digits as its factorization.

128850810811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2741506660.

The product of its (nonzero) digits is 40960, while the sum is 43.

The spelling of 128850810811 in words is "one hundred twenty-eight billion, eight hundred fifty million, eight hundred ten thousand, eight hundred eleven".