4812171905 has 4 divisors (see below), whose sum is σ = 5774606292. Its totient is φ = 3849737520.

The previous prime is 4812171893. The next prime is 4812171911. The reversal of 4812171905 is 5091712184.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1232782321 + 3579389584 = 35111^2 + 59828^2 .

It is not a de Polignac number, because 4812171905 - 2⁶ = 4812171841 is a prime.

It is a Duffinian number.

It is a Curzon 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 3 ways as a sum of consecutive naturals, for example, 481217186 + ... + 481217195.

It is an arithmetic number, because the mean of its divisors is an integer number (1443651573).

Almost surely, 2^4812171905 is an apocalyptic number.

It is an amenable number.

4812171905 is a deficient number, since it is larger than the sum of its proper divisors (962434387).

4812171905 is an equidigital number, since it uses as much as digits as its factorization.

4812171905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 962434386.

The product of its (nonzero) digits is 20160, while the sum is 38.

The square root of 4812171905 is about 69369.8198426376. The cubic root of 4812171905 is about 1688.2899857108.

The spelling of 4812171905 in words is "four billion, eight hundred twelve million, one hundred seventy-one thousand, nine hundred five".