813554886811 has 4 divisors (see below), whose sum is σ = 813764732032. Its totient is φ = 813345041592.

The previous prime is 813554886799. The next prime is 813554886841. The reversal of 813554886811 is 118688455318.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 813554886811 - 2⁹ = 813554886299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (813554886841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104916795 + ... + 104924548.

It is an arithmetic number, because the mean of its divisors is an integer number (203441183008).

Almost surely, 2^813554886811 is an apocalyptic number.

813554886811 is a deficient number, since it is larger than the sum of its proper divisors (209845221).

813554886811 is a wasteful number, since it uses less digits than its factorization.

813554886811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209845220.

The product of its digits is 7372800, while the sum is 58.

The spelling of 813554886811 in words is "eight hundred thirteen billion, five hundred fifty-four million, eight hundred eighty-six thousand, eight hundred eleven".