768531135866 has 24 divisors (see below), whose sum is σ = 1251191168064. Its totient is φ = 353883625680.

The previous prime is 768531135863. The next prime is 768531135871. The reversal of 768531135866 is 668531135867.

It is not an unprimeable number, because it can be changed into a prime (768531135863) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2492096 + ... + 2783451.

It is an arithmetic number, because the mean of its divisors is an integer number (52132965336).

Almost surely, 2^768531135866 is an apocalyptic number.

768531135866 is a deficient number, since it is larger than the sum of its proper divisors (482660032198).

768531135866 is a wasteful number, since it uses less digits than its factorization.

768531135866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5276006 (or 5275993 counting only the distinct ones).

The product of its digits is 21772800, while the sum is 59.

Subtracting from 768531135866 its reverse (668531135867), we obtain a palindrome (99999999999).

The spelling of 768531135866 in words is "seven hundred sixty-eight billion, five hundred thirty-one million, one hundred thirty-five thousand, eight hundred sixty-six".