1816554073 has 2 divisors, whose sum is σ = 1816554074. Its totient is φ = 1816554072.

The previous prime is 1816554067. The next prime is 1816554121. The reversal of 1816554073 is 3704556181.

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., 1050537744 + 766016329 = 32412^2 + 27677^2 .

It is a cyclic number.

It is not a de Polignac number, because 1816554073 - 2¹³ = 1816545881 is a prime.

It is not a weakly prime, because it can be changed into another prime (1816554373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 908277036 + 908277037.

It is an arithmetic number, because the mean of its divisors is an integer number (908277037).

Almost surely, 2^1816554073 is an apocalyptic number.

It is an amenable number.

1816554073 is a deficient number, since it is larger than the sum of its proper divisors (1).

1816554073 is an equidigital number, since it uses as much as digits as its factorization.

1816554073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 100800, while the sum is 40.

The square root of 1816554073 is about 42621.0519931172. The cubic root of 1816554073 is about 1220.1581074764.

The spelling of 1816554073 in words is "one billion, eight hundred sixteen million, five hundred fifty-four thousand, seventy-three".