678105317406 has 32 divisors (see below), whose sum is σ = 1479534739200. Its totient is φ = 205481983680.

The previous prime is 678105317347. The next prime is 678105317441. The reversal of 678105317406 is 604713501876.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4176615 + ... + 4335933.

It is an arithmetic number, because the mean of its divisors is an integer number (46235460600).

Almost surely, 2^678105317406 is an apocalyptic number.

678105317406 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

678105317406 is an abundant number, since it is smaller than the sum of its proper divisors (801429421794).

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

678105317406 is a wasteful number, since it uses less digits than its factorization.

678105317406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223824.

The product of its (nonzero) digits is 846720, while the sum is 48.

The spelling of 678105317406 in words is "six hundred seventy-eight billion, one hundred five million, three hundred seventeen thousand, four hundred six".