768643775 has 6 divisors (see below), whose sum is σ = 953118312. Its totient is φ = 614915000.

The previous prime is 768643723. The next prime is 768643807. The reversal of 768643775 is 577346867.

It is not a de Polignac number, because 768643775 - 2¹⁰ = 768642751 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15372851 + ... + 15372900.

It is an arithmetic number, because the mean of its divisors is an integer number (158853052).

Almost surely, 2^768643775 is an apocalyptic number.

768643775 is a deficient number, since it is larger than the sum of its proper divisors (184474537).

768643775 is a wasteful number, since it uses less digits than its factorization.

768643775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30745761 (or 30745756 counting only the distinct ones).

The product of its digits is 5927040, while the sum is 53.

The square root of 768643775 is about 27724.4256027064. The cubic root of 768643775 is about 916.0272039714.

The spelling of 768643775 in words is "seven hundred sixty-eight million, six hundred forty-three thousand, seven hundred seventy-five".