810105005 has 4 divisors (see below), whose sum is σ = 972126012. Its totient is φ = 648084000.

The previous prime is 810105001. The next prime is 810105007. The reversal of 810105005 is 500501018.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 500501018 = 2 ⋅250250509.

It can be written as a sum of positive squares in 2 ways, for example, as 603291844 + 206813161 = 24562^2 + 14381^2 .

It is not a de Polignac number, because 810105005 - 2² = 810105001 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (810105001) 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 in 3 ways as a sum of consecutive naturals, for example, 81010496 + ... + 81010505.

It is an arithmetic number, because the mean of its divisors is an integer number (243031503).

Almost surely, 2^810105005 is an apocalyptic number.

It is an amenable number.

810105005 is a deficient number, since it is larger than the sum of its proper divisors (162021007).

810105005 is a wasteful number, since it uses less digits than its factorization.

810105005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162021006.

The product of its (nonzero) digits is 200, while the sum is 20.

The square root of 810105005 is about 28462.3436315424. The cubic root of 810105005 is about 932.2100309036.

The spelling of 810105005 in words is "eight hundred ten million, one hundred five thousand, five".