1856338473193 has 2 divisors, whose sum is σ = 1856338473194. Its totient is φ = 1856338473192.

The previous prime is 1856338473139. The next prime is 1856338473317. The reversal of 1856338473193 is 3913748336581.

Together with previous prime (1856338473139) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1847239793424 + 9098679769 = 1359132^2 + 95387^2 .

It is a cyclic number.

It is not a de Polignac number, because 1856338473193 - 2¹⁷ = 1856338342121 is a prime.

It is not a weakly prime, because it can be changed into another prime (1856338477193) 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, 928169236596 + 928169236597.

It is an arithmetic number, because the mean of its divisors is an integer number (928169236597).

Almost surely, 2^{1856338473193} is an apocalyptic number.

It is an amenable number.

1856338473193 is a deficient number, since it is larger than the sum of its proper divisors (1).

1856338473193 is an equidigital number, since it uses as much as digits as its factorization.

1856338473193 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 39191040, while the sum is 61.

The spelling of 1856338473193 in words is "one trillion, eight hundred fifty-six billion, three hundred thirty-eight million, four hundred seventy-three thousand, one hundred ninety-three".