810071074138 has 8 divisors (see below), whose sum is σ = 1215641200788. Its totient is φ = 404857340544.

The previous prime is 810071074121. The next prime is 810071074159. The reversal of 810071074138 is 831470170018.

It can be written as a sum of positive squares in 2 ways, for example, as 790457911929 + 19613162209 = 889077^2 + 140047^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 810071074138.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89092581 + ... + 89101672.

Almost surely, 2^810071074138 is an apocalyptic number.

810071074138 is a deficient number, since it is larger than the sum of its proper divisors (405570126650).

810071074138 is a wasteful number, since it uses less digits than its factorization.

810071074138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178196528.

The product of its (nonzero) digits is 37632, while the sum is 40.

The spelling of 810071074138 in words is "eight hundred ten billion, seventy-one million, seventy-four thousand, one hundred thirty-eight".