1816406573 has 2 divisors, whose sum is σ = 1816406574. Its totient is φ = 1816406572.

The previous prime is 1816406567. The next prime is 1816406587. The reversal of 1816406573 is 3756046181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1342343044 + 474063529 = 36638^2 + 21773^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1816406573 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1816406573.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1816406533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 908203286 + 908203287.

It is an arithmetic number, because the mean of its divisors is an integer number (908203287).

Almost surely, 2^1816406573 is an apocalyptic number.

It is an amenable number.

1816406573 is a deficient number, since it is larger than the sum of its proper divisors (1).

1816406573 is an equidigital number, since it uses as much as digits as its factorization.

1816406573 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 1816406573 is about 42619.3215924421. The cubic root of 1816406573 is about 1220.1250819080.

The spelling of 1816406573 in words is "one billion, eight hundred sixteen million, four hundred six thousand, five hundred seventy-three".