678763556347 has 4 divisors (see below), whose sum is σ = 679016169216. Its totient is φ = 678510943480.

The previous prime is 678763556291. The next prime is 678763556377. The reversal of 678763556347 is 743655367876.

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 678763556347 - 2²⁷ = 678629338619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (678763556377) 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, 126302404 + ... + 126307777.

It is an arithmetic number, because the mean of its divisors is an integer number (169754042304).

Almost surely, 2^678763556347 is an apocalyptic number.

678763556347 is a deficient number, since it is larger than the sum of its proper divisors (252612869).

678763556347 is a wasteful number, since it uses less digits than its factorization.

678763556347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252612868.

The product of its digits is 533433600, while the sum is 67.

The spelling of 678763556347 in words is "six hundred seventy-eight billion, seven hundred sixty-three million, five hundred fifty-six thousand, three hundred forty-seven".