6560989281 has 32 divisors (see below), whose sum is σ = 12118425600. Its totient is φ = 3408305040.

The previous prime is 6560989241. The next prime is 6560989297. The reversal of 6560989281 is 1829890656.

It is a happy number.

6560989281 is a `hidden beast` number, since 6 + 5 + 609 + 8 + 9 + 28 + 1 = 666.

It is not a de Polignac number, because 6560989281 - 2⁷ = 6560989153 is a prime.

It is a super-2 number, since 2×6560989281² = 86093160690793793922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6560989241) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 1575841 + ... + 1579998.

It is an arithmetic number, because the mean of its divisors is an integer number (378700800).

Almost surely, 2^6560989281 is an apocalyptic number.

It is an amenable number.

6560989281 is a deficient number, since it is larger than the sum of its proper divisors (5557436319).

6560989281 is a wasteful number, since it uses less digits than its factorization.

6560989281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3155866 (or 3155860 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 54.

The square root of 6560989281 is about 80999.9338333063. The cubic root of 6560989281 is about 1872.0744212483.

The spelling of 6560989281 in words is "six billion, five hundred sixty million, nine hundred eighty-nine thousand, two hundred eighty-one".