6560551391 has 16 divisors (see below), whose sum is σ = 6695377920. Its totient is φ = 6427134720.

The previous prime is 6560551381. The next prime is 6560551397. The reversal of 6560551391 is 1931550656.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6560551391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6560551397) 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, 12888845 + ... + 12889353.

It is an arithmetic number, because the mean of its divisors is an integer number (418461120).

Almost surely, 2^6560551391 is an apocalyptic number.

6560551391 is a deficient number, since it is larger than the sum of its proper divisors (134826529).

6560551391 is a wasteful number, since it uses less digits than its factorization.

6560551391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1426.

The product of its (nonzero) digits is 121500, while the sum is 41.

The square root of 6560551391 is about 80997.2307613044. The cubic root of 6560551391 is about 1872.0327719953.

The spelling of 6560551391 in words is "six billion, five hundred sixty million, five hundred fifty-one thousand, three hundred ninety-one".