6510561191 has 2 divisors, whose sum is σ = 6510561192. Its totient is φ = 6510561190.

The previous prime is 6510561163. The next prime is 6510561199. The reversal of 6510561191 is 1911650156.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6510561191 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6510561199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3255280595 + 3255280596.

It is an arithmetic number, because the mean of its divisors is an integer number (3255280596).

Almost surely, 2^6510561191 is an apocalyptic number.

6510561191 is a deficient number, since it is larger than the sum of its proper divisors (1).

6510561191 is an equidigital number, since it uses as much as digits as its factorization.

6510561191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8100, while the sum is 35.

The square root of 6510561191 is about 80688.0486255554. The cubic root of 6510561191 is about 1867.2657946333.

The spelling of 6510561191 in words is "six billion, five hundred ten million, five hundred sixty-one thousand, one hundred ninety-one".