1816850005 has 8 divisors (see below), whose sum is σ = 2204717400. Its totient is φ = 1437148416.

The previous prime is 1816849973. The next prime is 1816850011. The reversal of 1816850005 is 5000586181.

It can be written as a sum of positive squares in 4 ways, for example, as 211004676 + 1605845329 = 14526^2 + 40073^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1816850005 - 2⁵ = 1816849973 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2040960 + ... + 2041849.

It is an arithmetic number, because the mean of its divisors is an integer number (275589675).

Almost surely, 2^1816850005 is an apocalyptic number.

It is an amenable number.

1816850005 is a deficient number, since it is larger than the sum of its proper divisors (387867395).

1816850005 is an equidigital number, since it uses as much as digits as its factorization.

1816850005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4082903.

The product of its (nonzero) digits is 9600, while the sum is 34.

The square root of 1816850005 is about 42624.5235163984. The cubic root of 1816850005 is about 1220.2243618988.

The spelling of 1816850005 in words is "one billion, eight hundred sixteen million, eight hundred fifty thousand, five".