811128956646 has 32 divisors (see below), whose sum is σ = 1743321951360. Its totient is φ = 250673740416.

The previous prime is 811128956611. The next prime is 811128956653. The reversal of 811128956646 is 646659821118.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 59338276 + ... + 59351943.

It is an arithmetic number, because the mean of its divisors is an integer number (54478810980).

Almost surely, 2^811128956646 is an apocalyptic number.

811128956646 is an abundant number, since it is smaller than the sum of its proper divisors (932192994714).

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

811128956646 is a wasteful number, since it uses less digits than its factorization.

811128956646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118690308.

The product of its digits is 4976640, while the sum is 57.

The spelling of 811128956646 in words is "eight hundred eleven billion, one hundred twenty-eight million, nine hundred fifty-six thousand, six hundred forty-six".