810136205 has 16 divisors (see below), whose sum is σ = 981227520. Its totient is φ = 642093312.

The previous prime is 810136177. The next prime is 810136213. The reversal of 810136205 is 502631018.

It is a cyclic number.

It is not a de Polignac number, because 810136205 - 2¹² = 810132109 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 (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 279956 + ... + 282834.

It is an arithmetic number, because the mean of its divisors is an integer number (61326720).

Almost surely, 2^810136205 is an apocalyptic number.

It is an amenable number.

810136205 is a deficient number, since it is larger than the sum of its proper divisors (171091315).

810136205 is a wasteful number, since it uses less digits than its factorization.

810136205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3388.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 810136205 is about 28462.8917188679. The cubic root of 810136205 is about 932.2219983150.

The spelling of 810136205 in words is "eight hundred ten million, one hundred thirty-six thousand, two hundred five".