81800743112 has 16 divisors (see below), whose sum is σ = 167319702000. Its totient is φ = 37182155920.

The previous prime is 81800743069. The next prime is 81800743133. The reversal of 81800743112 is 21134700818.

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, 464776862 + ... + 464777037.

It is an arithmetic number, because the mean of its divisors is an integer number (10457481375).

Almost surely, 2^81800743112 is an apocalyptic number.

It is an amenable number.

81800743112 is an abundant number, since it is smaller than the sum of its proper divisors (85518958888).

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

81800743112 is a wasteful number, since it uses less digits than its factorization.

81800743112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 929553916 (or 929553912 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 35.

The spelling of 81800743112 in words is "eighty-one billion, eight hundred million, seven hundred forty-three thousand, one hundred twelve".