2136828509 has 4 divisors (see below), whose sum is σ = 2136933660. Its totient is φ = 2136723360.

The previous prime is 2136828503. The next prime is 2136828553. The reversal of 2136828509 is 9058286312.

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 can be written as a sum of positive squares in 2 ways, for example, as 1073872900 + 1062955609 = 32770^2 + 32603^2 .

It is a cyclic number.

It is not a de Polignac number, because 2136828509 - 2⁴ = 2136828493 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2136828509.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2136828503) 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, 11282 + ... + 66339.

It is an arithmetic number, because the mean of its divisors is an integer number (534233415).

Almost surely, 2^2136828509 is an apocalyptic number.

It is an amenable number.

2136828509 is a deficient number, since it is larger than the sum of its proper divisors (105151).

2136828509 is an equidigital number, since it uses as much as digits as its factorization.

2136828509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105150.

The product of its (nonzero) digits is 207360, while the sum is 44.

The square root of 2136828509 is about 46225.8424368880. The cubic root of 2136828509 is about 1288.0218281748.

The spelling of 2136828509 in words is "two billion, one hundred thirty-six million, eight hundred twenty-eight thousand, five hundred nine".