81783334112 has 12 divisors (see below), whose sum is σ = 161010939096. Its totient is φ = 40891667040.

The previous prime is 81783334109. The next prime is 81783334123. The reversal of 81783334112 is 21143338718.

It is a self number, because there is not a number n which added to its sum of digits gives 81783334112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1277864564 + ... + 1277864627.

It is an arithmetic number, because the mean of its divisors is an integer number (13417578258).

Almost surely, 2^81783334112 is an apocalyptic number.

It is an amenable number.

81783334112 is a deficient number, since it is larger than the sum of its proper divisors (79227604984).

81783334112 is a wasteful number, since it uses less digits than its factorization.

81783334112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2555729201 (or 2555729193 counting only the distinct ones).

The product of its digits is 96768, while the sum is 41.

The spelling of 81783334112 in words is "eighty-one billion, seven hundred eighty-three million, three hundred thirty-four thousand, one hundred twelve".