811802605211 has 16 divisors (see below), whose sum is σ = 893590288416. Its totient is φ = 732868321536.

The previous prime is 811802605177. The next prime is 811802605253. The reversal of 811802605211 is 112506208118.

It is not a de Polignac number, because 811802605211 - 2⁶ = 811802605147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (811802605111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1666505 + ... + 2097818.

It is an arithmetic number, because the mean of its divisors is an integer number (55849393026).

Almost surely, 2^811802605211 is an apocalyptic number.

811802605211 is a deficient number, since it is larger than the sum of its proper divisors (81787683205).

811802605211 is a wasteful number, since it uses less digits than its factorization.

811802605211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3764702.

The product of its (nonzero) digits is 7680, while the sum is 35.

The spelling of 811802605211 in words is "eight hundred eleven billion, eight hundred two million, six hundred five thousand, two hundred eleven".