812163385 has 16 divisors (see below), whose sum is σ = 1067855040. Its totient is φ = 588075840.

The previous prime is 812163353. The next prime is 812163413. The reversal of 812163385 is 583361218.

It is not a de Polignac number, because 812163385 - 2⁵ = 812163353 is a prime.

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, 19647 + ... + 44836.

It is an arithmetic number, because the mean of its divisors is an integer number (66740940).

Almost surely, 2^812163385 is an apocalyptic number.

It is an amenable number.

812163385 is a deficient number, since it is larger than the sum of its proper divisors (255691655).

812163385 is a wasteful number, since it uses less digits than its factorization.

812163385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64728.

The product of its digits is 34560, while the sum is 37.

The square root of 812163385 is about 28498.4803980844. The cubic root of 812163385 is about 932.9989078923.

The spelling of 812163385 in words is "eight hundred twelve million, one hundred sixty-three thousand, three hundred eighty-five".