194950205476849 has 15 divisors (see below), whose sum is σ = 207138734867703. Its totient is φ = 183478748542848.

The previous prime is 194950205476597. The next prime is 194950205476853. The reversal of 194950205476849 is 948674502059491.

The square root of 194950205476849 is 13962457.

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

It can be written as a sum of positive squares in 7 ways, for example, as 33284880183025 + 161665325293824 = 5769305^2 + 12714768^2 .

It is a de Polignac number, because none of the positive numbers 2^k-194950205476849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (194950205446849) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 4035125917 + ... + 4035174229.

Almost surely, 2^{194950205476849} is an apocalyptic number.

194950205476849 is the 13962457-th square number.

194950205476849 is the 6981229-th centered octagonal number.

It is an amenable number.

194950205476849 is a deficient number, since it is larger than the sum of its proper divisors (12188529390854).

194950205476849 is an frugal number, since it uses more digits than its factorization.

194950205476849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96694 (or 48330 counting only the distinct ones).

The product of its (nonzero) digits is 783820800, while the sum is 73.

The spelling of 194950205476849 in words is "one hundred ninety-four trillion, nine hundred fifty billion, two hundred five million, four hundred seventy-six thousand, eight hundred forty-nine".