281689873472 has 168 divisors, whose sum is σ = 672010848000. Its totient is φ = 116691563520.

The previous prime is 281689873459. The next prime is 281689873483. The reversal of 281689873472 is 274378986182.

It is a junction number, because it is equal to n+sod(n) for n = 281689873399 and 281689873408.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 145725818 + ... + 145727750.

Almost surely, 2^281689873472 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 281689873472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (336005424000).

281689873472 is an abundant number, since it is smaller than the sum of its proper divisors (390320974528).

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

281689873472 is a wasteful number, since it uses less digits than its factorization.

281689873472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3489 (or 3472 counting only the distinct ones).

The product of its digits is 65028096, while the sum is 65.

The spelling of 281689873472 in words is "two hundred eighty-one billion, six hundred eighty-nine million, eight hundred seventy-three thousand, four hundred seventy-two".