811105906656 has 24 divisors (see below), whose sum is σ = 2129153005224. Its totient is φ = 270368635520.

The previous prime is 811105906619. The next prime is 811105906687. The reversal of 811105906656 is 656609501118.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4224509835 + ... + 4224510026.

It is an arithmetic number, because the mean of its divisors is an integer number (88714708551).

Almost surely, 2^811105906656 is an apocalyptic number.

It is an amenable number.

811105906656 is an abundant number, since it is smaller than the sum of its proper divisors (1318047098568).

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

811105906656 is a wasteful number, since it uses less digits than its factorization.

811105906656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8449019874 (or 8449019866 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 48.

The spelling of 811105906656 in words is "eight hundred eleven billion, one hundred five million, nine hundred six thousand, six hundred fifty-six".