1809213214453 has 2 divisors, whose sum is σ = 1809213214454. Its totient is φ = 1809213214452.

The previous prime is 1809213214447. The next prime is 1809213214463. The reversal of 1809213214453 is 3544123129081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1808683386129 + 529828324 = 1344873^2 + 23018^2 .

It is a cyclic number.

It is not a de Polignac number, because 1809213214453 - 2²⁵ = 1809179660021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1809213214463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 904606607226 + 904606607227.

It is an arithmetic number, because the mean of its divisors is an integer number (904606607227).

Almost surely, 2^{1809213214453} is an apocalyptic number.

It is an amenable number.

1809213214453 is a deficient number, since it is larger than the sum of its proper divisors (1).

1809213214453 is an equidigital number, since it uses as much as digits as its factorization.

1809213214453 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 207360, while the sum is 43.

The spelling of 1809213214453 in words is "one trillion, eight hundred nine billion, two hundred thirteen million, two hundred fourteen thousand, four hundred fifty-three".