199528671371749 has 2 divisors, whose sum is σ = 199528671371750. Its totient is φ = 199528671371748.

The previous prime is 199528671371713. The next prime is 199528671371791. The reversal of 199528671371749 is 947173176825991.

199528671371749 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 174165612741124 + 25363058630625 = 13197182^2 + 5036175^2 .

It is a cyclic number.

It is not a de Polignac number, because 199528671371749 - 2¹¹ = 199528671369701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199528671371149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99764335685874 + 99764335685875.

It is an arithmetic number, because the mean of its divisors is an integer number (99764335685875).

Almost surely, 2^{199528671371749} is an apocalyptic number.

It is an amenable number.

199528671371749 is a deficient number, since it is larger than the sum of its proper divisors (1).

199528671371749 is an equidigital number, since it uses as much as digits as its factorization.

199528671371749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440270720, while the sum is 79.

The spelling of 199528671371749 in words is "one hundred ninety-nine trillion, five hundred twenty-eight billion, six hundred seventy-one million, three hundred seventy-one thousand, seven hundred forty-nine".