2126810609 has 16 divisors (see below), whose sum is σ = 2688961536. Its totient is φ = 1633909200.

The previous prime is 2126810597. The next prime is 2126810611. The reversal of 2126810609 is 9060186212.

It is not a de Polignac number, because 2126810609 - 2²⁰ = 2125762033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2126810669) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 189047 + ... + 199980.

It is an arithmetic number, because the mean of its divisors is an integer number (168060096).

Almost surely, 2^2126810609 is an apocalyptic number.

It is an amenable number.

2126810609 is a deficient number, since it is larger than the sum of its proper divisors (562150927).

2126810609 is a wasteful number, since it uses less digits than its factorization.

2126810609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389116.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 2126810609 is about 46117.3569168919. The cubic root of 2126810609 is about 1286.0058356389.

The spelling of 2126810609 in words is "two billion, one hundred twenty-six million, eight hundred ten thousand, six hundred nine".