678928980345 has 64 divisors (see below), whose sum is σ = 1366316550144. Its totient is φ = 279655326720.

The previous prime is 678928980307. The next prime is 678928980347. The reversal of 678928980345 is 543089829876.

It is not a de Polignac number, because 678928980345 - 2¹¹ = 678928978297 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 678928980345.

It is not an unprimeable number, because it can be changed into a prime (678928980347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2470447 + ... + 2731476.

It is an arithmetic number, because the mean of its divisors is an integer number (21348696096).

Almost surely, 2^678928980345 is an apocalyptic number.

It is an amenable number.

678928980345 is an abundant number, since it is smaller than the sum of its proper divisors (687387569799).

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

678928980345 is a wasteful number, since it uses less digits than its factorization.

678928980345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5202062.

The product of its (nonzero) digits is 209018880, while the sum is 69.

The spelling of 678928980345 in words is "six hundred seventy-eight billion, nine hundred twenty-eight million, nine hundred eighty thousand, three hundred forty-five".