768328655 has 4 divisors (see below), whose sum is σ = 921994392. Its totient is φ = 614662920.

The previous prime is 768328609. The next prime is 768328709. The reversal of 768328655 is 556823867.

768328655 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 556823867 = 29 ⋅19200823.

It is a de Polignac number, because none of the positive numbers 2^k-768328655 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 (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76832861 + ... + 76832870.

It is an arithmetic number, because the mean of its divisors is an integer number (230498598).

Almost surely, 2^768328655 is an apocalyptic number.

768328655 is a deficient number, since it is larger than the sum of its proper divisors (153665737).

768328655 is a wasteful number, since it uses less digits than its factorization.

768328655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153665736.

The product of its digits is 2419200, while the sum is 50.

The square root of 768328655 is about 27718.7419447564. The cubic root of 768328655 is about 915.9020059894.

The spelling of 768328655 in words is "seven hundred sixty-eight million, three hundred twenty-eight thousand, six hundred fifty-five".