281224939968 has 84 divisors (see below), whose sum is σ = 921234886000. Its totient is φ = 80349981696.

The previous prime is 281224939943. The next prime is 281224939981. The reversal of 281224939968 is 869939422182.

281224939968 is a `hidden beast` number, since 2 + 81 + 2 + 2 + 493 + 9 + 9 + 68 = 666.

It is a tau number, because it is divible by the number of its divisors (84).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 34870093 + ... + 34878156.

Almost surely, 2^281224939968 is an apocalyptic number.

281224939968 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

281224939968 is an abundant number, since it is smaller than the sum of its proper divisors (640009946032).

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

281224939968 is a wasteful number, since it uses less digits than its factorization.

281224939968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69748274 (or 69748261 counting only the distinct ones).

The product of its digits is 26873856, while the sum is 63.

The spelling of 281224939968 in words is "two hundred eighty-one billion, two hundred twenty-four million, nine hundred thirty-nine thousand, nine hundred sixty-eight".