8481897281 has 16 divisors (see below), whose sum is σ = 10063424448. Its totient is φ = 7047192000.

The previous prime is 8481897257. The next prime is 8481897299. The reversal of 8481897281 is 1827981848.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8481897281 is a prime.

It is a super-2 number, since 2×8481897281² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8481891281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 279191 + ... + 308076.

It is an arithmetic number, because the mean of its divisors is an integer number (628964028).

Almost surely, 2^8481897281 is an apocalyptic number.

It is an amenable number.

8481897281 is a deficient number, since it is larger than the sum of its proper divisors (1581527167).

8481897281 is a wasteful number, since it uses less digits than its factorization.

8481897281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 587392.

The product of its digits is 2064384, while the sum is 56.

The square root of 8481897281 is about 92097.2164671658. The cubic root of 8481897281 is about 2039.3777162109.

The spelling of 8481897281 in words is "eight billion, four hundred eighty-one million, eight hundred ninety-seven thousand, two hundred eighty-one".