6511332791 has 2 divisors, whose sum is σ = 6511332792. Its totient is φ = 6511332790.

The previous prime is 6511332781. The next prime is 6511332887. The reversal of 6511332791 is 1972331156.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6511332791 - 2³⁰ = 5437590967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6511332701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3255666395 + 3255666396.

It is an arithmetic number, because the mean of its divisors is an integer number (3255666396).

Almost surely, 2^6511332791 is an apocalyptic number.

6511332791 is a deficient number, since it is larger than the sum of its proper divisors (1).

6511332791 is an equidigital number, since it uses as much as digits as its factorization.

6511332791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34020, while the sum is 38.

The square root of 6511332791 is about 80692.8298611469. The cubic root of 6511332791 is about 1867.3395581349.

The spelling of 6511332791 in words is "six billion, five hundred eleven million, three hundred thirty-two thousand, seven hundred ninety-one".