2128629871 has 4 divisors (see below), whose sum is σ = 2128732600. Its totient is φ = 2128527144.

The previous prime is 2128629863. The next prime is 2128629901. The reversal of 2128629871 is 1789268212.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2128629871 - 2³ = 2128629863 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 (2128629851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8181 + ... + 65758.

It is an arithmetic number, because the mean of its divisors is an integer number (532183150).

Almost surely, 2^2128629871 is an apocalyptic number.

2128629871 is a deficient number, since it is larger than the sum of its proper divisors (102729).

2128629871 is an equidigital number, since it uses as much as digits as its factorization.

2128629871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102728.

The product of its digits is 193536, while the sum is 46.

The square root of 2128629871 is about 46137.0769663619. The cubic root of 2128629871 is about 1286.3724118896.

The spelling of 2128629871 in words is "two billion, one hundred twenty-eight million, six hundred twenty-nine thousand, eight hundred seventy-one".