199393871841 has 12 divisors (see below), whose sum is σ = 294711356368. Its totient is φ = 129837869784.

The previous prime is 199393871839. The next prime is 199393871867. The reversal of 199393871841 is 148178393991.

199393871841 is a `hidden beast` number, since 1 + 99 + 393 + 87 + 1 + 84 + 1 = 666.

It is not a de Polignac number, because 199393871841 - 2¹ = 199393871839 is a prime.

It is a super-2 number, since 2×199393871841² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199393871881) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 257614435 + ... + 257615208.

Almost surely, 2^199393871841 is an apocalyptic number.

It is an amenable number.

199393871841 is a deficient number, since it is larger than the sum of its proper divisors (95317484527).

199393871841 is a wasteful number, since it uses less digits than its factorization.

199393871841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515229692 (or 515229689 counting only the distinct ones).

The product of its digits is 11757312, while the sum is 63.

The spelling of 199393871841 in words is "one hundred ninety-nine billion, three hundred ninety-three million, eight hundred seventy-one thousand, eight hundred forty-one".