2236257851809 has 2 divisors, whose sum is σ = 2236257851810. Its totient is φ = 2236257851808.

The previous prime is 2236257851801. The next prime is 2236257851827. The reversal of 2236257851809 is 9081587526322.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1598770580625 + 637487271184 = 1264425^2 + 798428^2 .

It is a cyclic number.

It is not a de Polignac number, because 2236257851809 - 2³ = 2236257851801 is a prime.

It is not a weakly prime, because it can be changed into another prime (2236257851801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1118128925904 + 1118128925905.

It is an arithmetic number, because the mean of its divisors is an integer number (1118128925905).

Almost surely, 2^{2236257851809} is an apocalyptic number.

It is an amenable number.

2236257851809 is a deficient number, since it is larger than the sum of its proper divisors (1).

2236257851809 is an equidigital number, since it uses as much as digits as its factorization.

2236257851809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14515200, while the sum is 58.

The spelling of 2236257851809 in words is "two trillion, two hundred thirty-six billion, two hundred fifty-seven million, eight hundred fifty-one thousand, eight hundred nine".