126810809233 has 2 divisors, whose sum is σ = 126810809234. Its totient is φ = 126810809232.

The previous prime is 126810809231. The next prime is 126810809297. The reversal of 126810809233 is 332908018621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76299145729 + 50511663504 = 276223^2 + 224748^2 .

It is a cyclic number.

It is not a de Polignac number, because 126810809233 - 2¹ = 126810809231 is a prime.

Together with 126810809231, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 126810809233.

It is not a weakly prime, because it can be changed into another prime (126810809231) 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, 63405404616 + 63405404617.

It is an arithmetic number, because the mean of its divisors is an integer number (63405404617).

Almost surely, 2^126810809233 is an apocalyptic number.

It is an amenable number.

126810809233 is a deficient number, since it is larger than the sum of its proper divisors (1).

126810809233 is an equidigital number, since it uses as much as digits as its factorization.

126810809233 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 124416, while the sum is 43.

The spelling of 126810809233 in words is "one hundred twenty-six billion, eight hundred ten million, eight hundred nine thousand, two hundred thirty-three".