6865998511 has 2 divisors, whose sum is σ = 6865998512. Its totient is φ = 6865998510.

The previous prime is 6865998509. The next prime is 6865998541. The reversal of 6865998511 is 1158995686.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6865998511 - 2¹ = 6865998509 is a prime.

Together with 6865998509, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6865998541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3432999255 + 3432999256.

It is an arithmetic number, because the mean of its divisors is an integer number (3432999256).

Almost surely, 2^6865998511 is an apocalyptic number.

6865998511 is a deficient number, since it is larger than the sum of its proper divisors (1).

6865998511 is an equidigital number, since it uses as much as digits as its factorization.

6865998511 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4665600, while the sum is 58.

The square root of 6865998511 is about 82861.3209585751. The cubic root of 6865998511 is about 1900.6459955736.

The spelling of 6865998511 in words is "six billion, eight hundred sixty-five million, nine hundred ninety-eight thousand, five hundred eleven".