12001819553 has 2 divisors, whose sum is σ = 12001819554. Its totient is φ = 12001819552.

The previous prime is 12001819513. The next prime is 12001819567. The reversal of 12001819553 is 35591810021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10434213904 + 1567605649 = 102148^2 + 39593^2 .

It is a cyclic number.

It is not a de Polignac number, because 12001819553 - 2³⁰ = 10928077729 is a prime.

It is not a weakly prime, because it can be changed into another prime (12001819513) 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, 6000909776 + 6000909777.

It is an arithmetic number, because the mean of its divisors is an integer number (6000909777).

Almost surely, 2^12001819553 is an apocalyptic number.

It is an amenable number.

12001819553 is a deficient number, since it is larger than the sum of its proper divisors (1).

12001819553 is an equidigital number, since it uses as much as digits as its factorization.

12001819553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10800, while the sum is 35.

The spelling of 12001819553 in words is "twelve billion, one million, eight hundred nineteen thousand, five hundred fifty-three".