199528671343609 has 2 divisors, whose sum is σ = 199528671343610. Its totient is φ = 199528671343608.

The previous prime is 199528671343549. The next prime is 199528671343649. The reversal of 199528671343609 is 906343176825991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 156903807515625 + 42624863827984 = 12526125^2 + 6528772^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199528671343609 is a prime.

It is not a weakly prime, because it can be changed into another prime (199528671343649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99764335671804 + 99764335671805.

It is an arithmetic number, because the mean of its divisors is an integer number (99764335671805).

It is a 3-persistent number, because k⋅199528671343609 is pandigital for 1 ≤ k ≤ 3, but not for k = 4.

Almost surely, 2^{199528671343609} is an apocalyptic number.

It is an amenable number.

199528671343609 is a deficient number, since it is larger than the sum of its proper divisors (1).

199528671343609 is an equidigital number, since it uses as much as digits as its factorization.

199528671343609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 529079040, while the sum is 73.

The spelling of 199528671343609 in words is "one hundred ninety-nine trillion, five hundred twenty-eight billion, six hundred seventy-one million, three hundred forty-three thousand, six hundred nine".