811105926613 has 4 divisors (see below), whose sum is σ = 816549590700. Its totient is φ = 805662262528.

The previous prime is 811105926611. The next prime is 811105926793. The reversal of 811105926613 is 316629501118.

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

It can be written as a sum of positive squares in 2 ways, for example, as 426019900804 + 385086025809 = 652702^2 + 620553^2 .

It is a cyclic number.

It is not a de Polignac number, because 811105926613 - 2¹ = 811105926611 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 811105926613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (811105926611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2721831820 + ... + 2721832117.

It is an arithmetic number, because the mean of its divisors is an integer number (204137397675).

Almost surely, 2^811105926613 is an apocalyptic number.

It is an amenable number.

811105926613 is a deficient number, since it is larger than the sum of its proper divisors (5443664087).

811105926613 is a wasteful number, since it uses less digits than its factorization.

811105926613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5443664086.

The product of its (nonzero) digits is 77760, while the sum is 43.

The spelling of 811105926613 in words is "eight hundred eleven billion, one hundred five million, nine hundred twenty-six thousand, six hundred thirteen".