199132815049 has 21 divisors (see below), whose sum is σ = 232500044071. Its totient is φ = 170554074600.

The previous prime is 199132815031. The next prime is 199132815053. The reversal of 199132815049 is 940518231991.

The square root of 199132815049 is 446243.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 306005049 + 198826810000 = 17493^2 + 445900^2 .

It is not a de Polignac number, because 199132815049 - 2¹⁵ = 199132782281 is a prime.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 199132814987 and 199132815005.

It is not an unprimeable number, because it can be changed into a prime (199132815029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 153060699 + ... + 153061999.

Almost surely, 2^199132815049 is an apocalyptic number.

199132815049 is the 446243-rd square number.

199132815049 is the 223122-nd centered octagonal number.

It is an amenable number.

199132815049 is a deficient number, since it is larger than the sum of its proper divisors (33367229022).

199132815049 is an frugal number, since it uses more digits than its factorization.

199132815049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2644 (or 1308 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 52.

The spelling of 199132815049 in words is "one hundred ninety-nine billion, one hundred thirty-two million, eight hundred fifteen thousand, forty-nine".