281857442968 has 16 divisors (see below), whose sum is σ = 530350139880. Its totient is φ = 140430739008.

The previous prime is 281857442957. The next prime is 281857442983. The reversal of 281857442968 is 869244758182.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 62245405 + ... + 62249932.

Almost surely, 2^281857442968 is an apocalyptic number.

It is an amenable number.

281857442968 is a deficient number, since it is larger than the sum of its proper divisors (248492696912).

281857442968 is a wasteful number, since it uses less digits than its factorization.

281857442968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124495626 (or 124495622 counting only the distinct ones).

The product of its digits is 61931520, while the sum is 64.

The spelling of 281857442968 in words is "two hundred eighty-one billion, eight hundred fifty-seven million, four hundred forty-two thousand, nine hundred sixty-eight".