800561112778 has 16 divisors (see below), whose sum is σ = 1391190350400. Its totient is φ = 338397651936.

The previous prime is 800561112773. The next prime is 800561112779. The reversal of 800561112778 is 877211165008.

It is not an unprimeable number, because it can be changed into a prime (800561112773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 391662928 + ... + 391664971.

It is an arithmetic number, because the mean of its divisors is an integer number (86949396900).

Almost surely, 2^800561112778 is an apocalyptic number.

800561112778 is a deficient number, since it is larger than the sum of its proper divisors (590629237622).

800561112778 is a wasteful number, since it uses less digits than its factorization.

800561112778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 783327981.

The product of its (nonzero) digits is 188160, while the sum is 46.

The spelling of 800561112778 in words is "eight hundred billion, five hundred sixty-one million, one hundred twelve thousand, seven hundred seventy-eight".