199678497316 has 27 divisors (see below), whose sum is σ = 350962623921. Its totient is φ = 99405353424.

The previous prime is 199678497299. The next prime is 199678497341. The reversal of 199678497316 is 613794876991.

The square root of 199678497316 is 446854.

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., 108537302500 + 91141194816 = 329450^2 + 301896^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 333352785 + ... + 333353383.

Almost surely, 2^199678497316 is an apocalyptic number.

199678497316 is the 446854-th square number.

It is an amenable number.

199678497316 is a deficient number, since it is larger than the sum of its proper divisors (151284126605).

199678497316 is an frugal number, since it uses more digits than its factorization.

199678497316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1948 (or 974 counting only the distinct ones).

The product of its digits is 123451776, while the sum is 70.

The spelling of 199678497316 in words is "one hundred ninety-nine billion, six hundred seventy-eight million, four hundred ninety-seven thousand, three hundred sixteen".