813146785 has 16 divisors (see below), whose sum is σ = 1068137280. Its totient is φ = 589349440.

The previous prime is 813146779. The next prime is 813146797. The reversal of 813146785 is 587641318.

It is not a de Polignac number, because 813146785 - 2¹³ = 813138593 is a prime.

It is a super-2 number, since 2×813146785² = 1322415387911672450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9115 + ... + 41344.

It is an arithmetic number, because the mean of its divisors is an integer number (66758580).

Almost surely, 2^813146785 is an apocalyptic number.

It is an amenable number.

813146785 is a deficient number, since it is larger than the sum of its proper divisors (254990495).

813146785 is a wasteful number, since it uses less digits than its factorization.

813146785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50768.

The product of its digits is 161280, while the sum is 43.

The square root of 813146785 is about 28515.7287299483. The cubic root of 813146785 is about 933.3753268379.

The spelling of 813146785 in words is "eight hundred thirteen million, one hundred forty-six thousand, seven hundred eighty-five".