6511257089 has 2 divisors, whose sum is σ = 6511257090. Its totient is φ = 6511257088.

The previous prime is 6511257029. The next prime is 6511257097. The reversal of 6511257089 is 9807521156.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6016639489 + 494617600 = 77567^2 + 22240^2 .

It is a cyclic number.

It is not a de Polignac number, because 6511257089 - 2³² = 2216289793 is a prime.

It is not a weakly prime, because it can be changed into another prime (6511257029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3255628544 + 3255628545.

It is an arithmetic number, because the mean of its divisors is an integer number (3255628545).

Almost surely, 2^6511257089 is an apocalyptic number.

It is an amenable number.

6511257089 is a deficient number, since it is larger than the sum of its proper divisors (1).

6511257089 is an equidigital number, since it uses as much as digits as its factorization.

6511257089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 151200, while the sum is 44.

The square root of 6511257089 is about 80692.3607846492. The cubic root of 6511257089 is about 1867.3323214246.

The spelling of 6511257089 in words is "six billion, five hundred eleven million, two hundred fifty-seven thousand, eighty-nine".