768773583665 has 16 divisors (see below), whose sum is σ = 927455192400. Its totient is φ = 611739482112.

The previous prime is 768773583649. The next prime is 768773583671. The reversal of 768773583665 is 566385377867.

It can be written as a sum of positive squares in 8 ways, for example, as 54449422336 + 714324161329 = 233344^2 + 845177^2 .

It is a cyclic number.

It is not a de Polignac number, because 768773583665 - 2⁴ = 768773583649 is a prime.

It is a super-2 number, since 2×768773583665² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 857801 + ... + 1507769.

It is an arithmetic number, because the mean of its divisors is an integer number (57965949525).

Almost surely, 2^768773583665 is an apocalyptic number.

It is an amenable number.

768773583665 is a deficient number, since it is larger than the sum of its proper divisors (158681608735).

768773583665 is a wasteful number, since it uses less digits than its factorization.

768773583665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 651236.

The product of its digits is 1066867200, while the sum is 71.

The spelling of 768773583665 in words is "seven hundred sixty-eight billion, seven hundred seventy-three million, five hundred eighty-three thousand, six hundred sixty-five".