6560440656 has 120 divisors (see below), whose sum is σ = 21507132384. Its totient is φ = 1704003840.

The previous prime is 6560440637. The next prime is 6560440681.

It is a happy number.

6560440656 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (42).

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 23 ways as a sum of consecutive naturals, for example, 100915 + ... + 152658.

Almost surely, 2^6560440656 is an apocalyptic number.

6560440656 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

6560440656 is an abundant number, since it is smaller than the sum of its proper divisors (14946691728).

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

6560440656 is a wasteful number, since it uses less digits than its factorization.

6560440656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253609 (or 253596 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 42.

The square root of 6560440656 is about 80996.5471856671. The cubic root of 6560440656 is about 1872.0222393077.

The spelling of 6560440656 in words is "six billion, five hundred sixty million, four hundred forty thousand, six hundred fifty-six".