678328485169 has 2 divisors, whose sum is σ = 678328485170. Its totient is φ = 678328485168.

The previous prime is 678328485119. The next prime is 678328485221. The reversal of 678328485169 is 961584823876.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 653408705569 + 24919779600 = 808337^2 + 157860^2 .

It is a cyclic number.

It is not a de Polignac number, because 678328485169 - 2¹⁷ = 678328354097 is a prime.

It is a super-2 number, since 2×678328485169² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (678328485119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339164242584 + 339164242585.

It is an arithmetic number, because the mean of its divisors is an integer number (339164242585).

Almost surely, 2^678328485169 is an apocalyptic number.

It is an amenable number.

678328485169 is a deficient number, since it is larger than the sum of its proper divisors (1).

678328485169 is an equidigital number, since it uses as much as digits as its factorization.

678328485169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139345920, while the sum is 67.

The spelling of 678328485169 in words is "six hundred seventy-eight billion, three hundred twenty-eight million, four hundred eighty-five thousand, one hundred sixty-nine".