281136780112 has 20 divisors (see below), whose sum is σ = 563485357620. Its totient is φ = 135721203968.

The previous prime is 281136780109. The next prime is 281136780143. The reversal of 281136780112 is 211087631182.

It can be written as a sum of positive squares in 2 ways, for example, as 237621151296 + 43515628816 = 487464^2 + 208604^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 302948653 + ... + 302949580.

It is an arithmetic number, because the mean of its divisors is an integer number (28174267881).

Almost surely, 2^281136780112 is an apocalyptic number.

It is an amenable number.

281136780112 is an abundant number, since it is smaller than the sum of its proper divisors (282348577508).

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

281136780112 is a wasteful number, since it uses less digits than its factorization.

281136780112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605898270 (or 605898264 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 40.

The spelling of 281136780112 in words is "two hundred eighty-one billion, one hundred thirty-six million, seven hundred eighty thousand, one hundred twelve".