281493481472 has 96 divisors (see below), whose sum is σ = 656385912000. Its totient is φ = 120639762432.

The previous prime is 281493481459. The next prime is 281493481501. The reversal of 281493481472 is 274184394182.

It is a super-2 number, since 2×281493481472² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 502103 + ... + 902825.

It is an arithmetic number, because the mean of its divisors is an integer number (6837353250).

Almost surely, 2^281493481472 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 281493481472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (328192956000).

281493481472 is an abundant number, since it is smaller than the sum of its proper divisors (374892430528).

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

281493481472 is an frugal number, since it uses more digits than its factorization.

281493481472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400766 (or 400732 counting only the distinct ones).

The product of its digits is 3096576, while the sum is 53.

The spelling of 281493481472 in words is "two hundred eighty-one billion, four hundred ninety-three million, four hundred eighty-one thousand, four hundred seventy-two".