2124851809 has 2 divisors, whose sum is σ = 2124851810. Its totient is φ = 2124851808.

The previous prime is 2124851801. The next prime is 2124851867. The reversal of 2124851809 is 9081584212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2118576784 + 6275025 = 46028^2 + 2505^2 .

It is a cyclic number.

It is not a de Polignac number, because 2124851809 - 2³ = 2124851801 is a prime.

It is not a weakly prime, because it can be changed into another prime (2124851801) 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 as a sum of consecutive naturals, namely, 1062425904 + 1062425905.

It is an arithmetic number, because the mean of its divisors is an integer number (1062425905).

Almost surely, 2^2124851809 is an apocalyptic number.

It is an amenable number.

2124851809 is a deficient number, since it is larger than the sum of its proper divisors (1).

2124851809 is an equidigital number, since it uses as much as digits as its factorization.

2124851809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46080, while the sum is 40.

The square root of 2124851809 is about 46096.1149013667. The cubic root of 2124851809 is about 1285.6109090822.

The spelling of 2124851809 in words is "two billion, one hundred twenty-four million, eight hundred fifty-one thousand, eight hundred nine".