678328486091 has 4 divisors (see below), whose sum is σ = 680643600672. Its totient is φ = 676013371512.

The previous prime is 678328486081. The next prime is 678328486097. The reversal of 678328486091 is 190684823876.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-678328486091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (678328486097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1157556851 + ... + 1157557436.

It is an arithmetic number, because the mean of its divisors is an integer number (170160900168).

Almost surely, 2^678328486091 is an apocalyptic number.

678328486091 is a deficient number, since it is larger than the sum of its proper divisors (2315114581).

678328486091 is a wasteful number, since it uses less digits than its factorization.

678328486091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2315114580.

The product of its (nonzero) digits is 27869184, while the sum is 62.

The spelling of 678328486091 in words is "six hundred seventy-eight billion, three hundred twenty-eight million, four hundred eighty-six thousand, ninety-one".