810941809138 has 16 divisors (see below), whose sum is σ = 1272852550656. Its totient is φ = 387015973920.

The previous prime is 810941809133. The next prime is 810941809177. The reversal of 810941809138 is 831908149018.

It is not an unprimeable number, because it can be changed into a prime (810941809133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89582506 + ... + 89591557.

It is an arithmetic number, because the mean of its divisors is an integer number (79553284416).

Almost surely, 2^810941809138 is an apocalyptic number.

810941809138 is a deficient number, since it is larger than the sum of its proper divisors (461910741518).

810941809138 is a wasteful number, since it uses less digits than its factorization.

810941809138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179174169.

The product of its (nonzero) digits is 497664, while the sum is 52.

The spelling of 810941809138 in words is "eight hundred ten billion, nine hundred forty-one million, eight hundred nine thousand, one hundred thirty-eight".