768278651 has 4 divisors (see below), whose sum is σ = 878032752. Its totient is φ = 658524552.

The previous prime is 768278633. The next prime is 768278663. The reversal of 768278651 is 156872867.

768278651 is digitally balanced in base 2, 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.

It is a de Polignac number, because none of the positive numbers 2^k-768278651 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 768278651.

It is not an unprimeable number, because it can be changed into a prime (768278681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54877040 + ... + 54877053.

It is an arithmetic number, because the mean of its divisors is an integer number (219508188).

Almost surely, 2^768278651 is an apocalyptic number.

768278651 is a deficient number, since it is larger than the sum of its proper divisors (109754101).

768278651 is a wasteful number, since it uses less digits than its factorization.

768278651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109754100.

The product of its digits is 1128960, while the sum is 50.

The square root of 768278651 is about 27717.8399410921. The cubic root of 768278651 is about 915.8821361255.

The spelling of 768278651 in words is "seven hundred sixty-eight million, two hundred seventy-eight thousand, six hundred fifty-one".