1817011816573 has 2 divisors, whose sum is σ = 1817011816574. Its totient is φ = 1817011816572.

The previous prime is 1817011816519. The next prime is 1817011816639. The reversal of 1817011816573 is 3756181107181.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1331261362809 + 485750453764 = 1153803^2 + 696958^2 .

It is a cyclic number.

It is not a de Polignac number, because 1817011816573 - 2¹⁷ = 1817011685501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1817011816073) 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, 908505908286 + 908505908287.

It is an arithmetic number, because the mean of its divisors is an integer number (908505908287).

Almost surely, 2^{1817011816573} is an apocalyptic number.

It is an amenable number.

1817011816573 is a deficient number, since it is larger than the sum of its proper divisors (1).

1817011816573 is an equidigital number, since it uses as much as digits as its factorization.

1817011816573 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 282240, while the sum is 49.

The spelling of 1817011816573 in words is "one trillion, eight hundred seventeen billion, eleven million, eight hundred sixteen thousand, five hundred seventy-three".