199952676366161 has 4 divisors (see below), whose sum is σ = 199954089990324. Its totient is φ = 199951262742000.

The previous prime is 199952676366137. The next prime is 199952676366211. The reversal of 199952676366161 is 161663676259991.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 40690926555136 + 159261749811025 = 6378944^2 + 12619895^2 .

It is a cyclic number.

It is not a de Polignac number, because 199952676366161 - 2¹⁸ = 199952676104017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199952676366061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 706599890 + ... + 706882811.

It is an arithmetic number, because the mean of its divisors is an integer number (49988522497581).

Almost surely, 2^{199952676366161} is an apocalyptic number.

It is an amenable number.

199952676366161 is a deficient number, since it is larger than the sum of its proper divisors (1413624163).

199952676366161 is a wasteful number, since it uses less digits than its factorization.

199952676366161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1413624162.

The product of its digits is 1190427840, while the sum is 77.

The spelling of 199952676366161 in words is "one hundred ninety-nine trillion, nine hundred fifty-two billion, six hundred seventy-six million, three hundred sixty-six thousand, one hundred sixty-one".