678436565634876 has 12 divisors (see below), whose sum is σ = 1583018653148072. Its totient is φ = 226145521878288.

The previous prime is 678436565634859. The next prime is 678436565634887.

678436565634876 is nontrivially palindromic in base 10.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28268190234775 + ... + 28268190234798.

Almost surely, 2^{678436565634876} is an apocalyptic number.

It is an amenable number.

678436565634876 is an abundant number, since it is smaller than the sum of its proper divisors (904582087513196).

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

678436565634876 is a wasteful number, since it uses less digits than its factorization.

678436565634876 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56536380469580 (or 56536380469578 counting only the distinct ones).

The product of its digits is 87787929600, while the sum is 84.

The spelling of 678436565634876 in words is "six hundred seventy-eight trillion, four hundred thirty-six billion, five hundred sixty-five million, six hundred thirty-four thousand, eight hundred seventy-six".