1678230381577 has 2 divisors, whose sum is σ = 1678230381578. Its totient is φ = 1678230381576.

The previous prime is 1678230381557. The next prime is 1678230381683. The reversal of 1678230381577 is 7751830328761.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1135479916921 + 542750464656 = 1065589^2 + 736716^2 .

It is a cyclic number.

It is not a de Polignac number, because 1678230381577 - 2¹⁹ = 1678229857289 is a prime.

It is not a weakly prime, because it can be changed into another prime (1678230381547) 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 as a sum of consecutive naturals, namely, 839115190788 + 839115190789.

It is an arithmetic number, because the mean of its divisors is an integer number (839115190789).

Almost surely, 2^{1678230381577} is an apocalyptic number.

It is an amenable number.

1678230381577 is a deficient number, since it is larger than the sum of its proper divisors (1).

1678230381577 is an equidigital number, since it uses as much as digits as its factorization.

1678230381577 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11854080, while the sum is 58.

The spelling of 1678230381577 in words is "one trillion, six hundred seventy-eight billion, two hundred thirty million, three hundred eighty-one thousand, five hundred seventy-seven".