6560738321 has 4 divisors (see below), whose sum is σ = 6561878592. Its totient is φ = 6559598052.

The previous prime is 6560738309. The next prime is 6560738357. The reversal of 6560738321 is 1238370656.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6560738321 - 2¹⁸ = 6560476177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6560738221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 561461 + ... + 573026.

It is an arithmetic number, because the mean of its divisors is an integer number (1640469648).

Almost surely, 2^6560738321 is an apocalyptic number.

It is an amenable number.

6560738321 is a deficient number, since it is larger than the sum of its proper divisors (1140271).

6560738321 is a wasteful number, since it uses less digits than its factorization.

6560738321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1140270.

The product of its (nonzero) digits is 181440, while the sum is 41.

The square root of 6560738321 is about 80998.3846814244. The cubic root of 6560738321 is about 1872.0505517896.

The spelling of 6560738321 in words is "six billion, five hundred sixty million, seven hundred thirty-eight thousand, three hundred twenty-one".