1800816395 has 24 divisors (see below), whose sum is σ = 2623096224. Its totient is φ = 1181152896.

The previous prime is 1800816379. The next prime is 1800816397. The reversal of 1800816395 is 5936180081.

It is not a de Polignac number, because 1800816395 - 2⁴ = 1800816379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1800816397) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 154154 + ... + 165423.

It is an arithmetic number, because the mean of its divisors is an integer number (109295676).

Almost surely, 2^1800816395 is an apocalyptic number.

1800816395 is a deficient number, since it is larger than the sum of its proper divisors (822279829).

1800816395 is a wasteful number, since it uses less digits than its factorization.

1800816395 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319619 (or 319612 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 41.

The square root of 1800816395 is about 42436.0270878413. The cubic root of 1800816395 is about 1216.6242779586.

The spelling of 1800816395 in words is "one billion, eight hundred million, eight hundred sixteen thousand, three hundred ninety-five".