813333638873 has 32 divisors (see below), whose sum is σ = 938171953152. Its totient is φ = 690693350400.

The previous prime is 813333638869. The next prime is 813333638899. The reversal of 813333638873 is 378836333318.

It is a cyclic number.

It is not a de Polignac number, because 813333638873 - 2² = 813333638869 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (813333698873) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 544763915 + ... + 544765407.

It is an arithmetic number, because the mean of its divisors is an integer number (29317873536).

Almost surely, 2^813333638873 is an apocalyptic number.

It is an amenable number.

813333638873 is a deficient number, since it is larger than the sum of its proper divisors (124838314279).

813333638873 is a wasteful number, since it uses less digits than its factorization.

813333638873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3065.

The product of its digits is 15676416, while the sum is 56.

The spelling of 813333638873 in words is "eight hundred thirteen billion, three hundred thirty-three million, six hundred thirty-eight thousand, eight hundred seventy-three".