199498844161 has 16 divisors (see below), whose sum is σ = 206803840464. Its totient is φ = 192296208384.

The previous prime is 199498844141. The next prime is 199498844189. The reversal of 199498844161 is 161448894991.

It can be written as a sum of positive squares in 8 ways, for example, as 4692250000 + 194806594161 = 68500^2 + 441369^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199498844161 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 199498844093 and 199498844102.

It is not an unprimeable number, because it can be changed into a prime (199498844141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9593371 + ... + 9614143.

It is an arithmetic number, because the mean of its divisors is an integer number (12925240029).

Almost surely, 2^199498844161 is an apocalyptic number.

It is an amenable number.

199498844161 is a deficient number, since it is larger than the sum of its proper divisors (7304996303).

199498844161 is a wasteful number, since it uses less digits than its factorization.

199498844161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23220.

The product of its digits is 17915904, while the sum is 64.

The spelling of 199498844161 in words is "one hundred ninety-nine billion, four hundred ninety-eight million, eight hundred forty-four thousand, one hundred sixty-one".