811675653866 has 128 divisors (see below), whose sum is σ = 1636639893504. Its totient is φ = 292218347520.

The previous prime is 811675653851. The next prime is 811675653889. The reversal of 811675653866 is 668356576118.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 811675653799 and 811675653808.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 53842106 + ... + 53857178.

It is an arithmetic number, because the mean of its divisors is an integer number (12786249168).

Almost surely, 2^811675653866 is an apocalyptic number.

811675653866 is an abundant number, since it is smaller than the sum of its proper divisors (824964239638).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

811675653866 is a wasteful number, since it uses less digits than its factorization.

811675653866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15484.

The product of its digits is 43545600, while the sum is 62.

The spelling of 811675653866 in words is "eight hundred eleven billion, six hundred seventy-five million, six hundred fifty-three thousand, eight hundred sixty-six".