6487281656 has 16 divisors (see below), whose sum is σ = 12330279600. Its totient is φ = 3199207104.

The previous prime is 6487281623. The next prime is 6487281679. The reversal of 6487281656 is 6561827846.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 6487281598 and 6487281607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5553596 + ... + 5554763.

It is an arithmetic number, because the mean of its divisors is an integer number (770642475).

Almost surely, 2^6487281656 is an apocalyptic number.

It is an amenable number.

6487281656 is a deficient number, since it is larger than the sum of its proper divisors (5842997944).

6487281656 is a wasteful number, since it uses less digits than its factorization.

6487281656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11108438 (or 11108434 counting only the distinct ones).

The product of its digits is 3870720, while the sum is 53.

The square root of 6487281656 is about 80543.6630406142. The cubic root of 6487281656 is about 1865.0375692681.

The spelling of 6487281656 in words is "six billion, four hundred eighty-seven million, two hundred eighty-one thousand, six hundred fifty-six".