768764778 has 8 divisors (see below), whose sum is σ = 1537529568. Its totient is φ = 256254924.

The previous prime is 768764747. The next prime is 768764791. The reversal of 768764778 is 877467867.

It is a sphenic number, since it is the product of 3 distinct primes.

768764778 is an admirable 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 3 ways as a sum of consecutive naturals, for example, 64063726 + ... + 64063737.

It is an arithmetic number, because the mean of its divisors is an integer number (192191196).

Almost surely, 2^768764778 is an apocalyptic number.

768764778 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

768764778 is a wasteful number, since it uses less digits than its factorization.

768764778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128127468.

The product of its digits is 22127616, while the sum is 60.

The square root of 768764778 is about 27726.6077622200. The cubic root of 768764778 is about 916.0752696803.

The spelling of 768764778 in words is "seven hundred sixty-eight million, seven hundred sixty-four thousand, seven hundred seventy-eight".