1813451941863 has 24 divisors (see below), whose sum is σ = 2781894010896. Its totient is φ = 1134414547200.

The previous prime is 1813451941841. The next prime is 1813451941867. The reversal of 1813451941863 is 3681491543181.

1813451941863 is a `hidden beast` number, since 1 + 8 + 1 + 3 + 4 + 519 + 41 + 86 + 3 = 666.

It is not a de Polignac number, because 1813451941863 - 2⁸ = 1813451941607 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1813451941867) 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, 17853628 + ... + 17954913.

It is an arithmetic number, because the mean of its divisors is an integer number (115912250454).

Almost surely, 2^{1813451941863} is an apocalyptic number.

1813451941863 is a deficient number, since it is larger than the sum of its proper divisors (968442069033).

1813451941863 is a wasteful number, since it uses less digits than its factorization.

1813451941863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35808895 (or 35808892 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 54.

The spelling of 1813451941863 in words is "one trillion, eight hundred thirteen billion, four hundred fifty-one million, nine hundred forty-one thousand, eight hundred sixty-three".