6768115391 has 4 divisors (see below), whose sum is σ = 6770532792. Its totient is φ = 6765697992.

The previous prime is 6768115373. The next prime is 6768115421. The reversal of 6768115391 is 1935118676.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6768115391 - 2²⁶ = 6701006527 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6768115691) 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, 1204496 + ... + 1210101.

It is an arithmetic number, because the mean of its divisors is an integer number (1692633198).

Almost surely, 2^6768115391 is an apocalyptic number.

6768115391 is a deficient number, since it is larger than the sum of its proper divisors (2417401).

6768115391 is a wasteful number, since it uses less digits than its factorization.

6768115391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2417400.

The product of its digits is 272160, while the sum is 47.

The square root of 6768115391 is about 82268.5565146247. The cubic root of 6768115391 is about 1891.5707285321.

The spelling of 6768115391 in words is "six billion, seven hundred sixty-eight million, one hundred fifteen thousand, three hundred ninety-one".