6561316351 has 2 divisors, whose sum is σ = 6561316352. Its totient is φ = 6561316350.

The previous prime is 6561316331. The next prime is 6561316369. The reversal of 6561316351 is 1536131656.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6561316351 - 2⁵ = 6561316319 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6561316351.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6561316331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3280658175 + 3280658176.

It is an arithmetic number, because the mean of its divisors is an integer number (3280658176).

Almost surely, 2^6561316351 is an apocalyptic number.

6561316351 is a deficient number, since it is larger than the sum of its proper divisors (1).

6561316351 is an equidigital number, since it uses as much as digits as its factorization.

6561316351 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48600, while the sum is 37.

The square root of 6561316351 is about 81001.9527604119. The cubic root of 6561316351 is about 1872.1055288135.

The spelling of 6561316351 in words is "six billion, five hundred sixty-one million, three hundred sixteen thousand, three hundred fifty-one".