678765654543234 has 16 divisors (see below), whose sum is σ = 1376651468370240. Its totient is φ = 223068524967120.

The previous prime is 678765654543211. The next prime is 678765654543341. The reversal of 678765654543234 is 432345456567876.

678765654543234 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is an alternating number because its digits alternate between even and odd.

It is an unprimeable number.

It is an upside-down number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 796673303029 + ... + 796673303880.

It is an arithmetic number, because the mean of its divisors is an integer number (86040716773140).

Almost surely, 2^{678765654543234} is an apocalyptic number.

678765654543234 is an abundant number, since it is smaller than the sum of its proper divisors (697885813827006).

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

678765654543234 is a wasteful number, since it uses less digits than its factorization.

678765654543234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1593346606985.

The product of its digits is 12192768000, while the sum is 75.

The spelling of 678765654543234 in words is "six hundred seventy-eight trillion, seven hundred sixty-five billion, six hundred fifty-four million, five hundred forty-three thousand, two hundred thirty-four".