199823920641 has 24 divisors (see below), whose sum is σ = 307443112704. Its totient is φ = 124628922240.

The previous prime is 199823920619. The next prime is 199823920649. The reversal of 199823920641 is 146029328991.

199823920641 is a `hidden beast` number, since 199 + 8 + 2 + 392 + 0 + 64 + 1 = 666.

It is not a de Polignac number, because 199823920641 - 2²⁷ = 199689702913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (199823920649) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 3884745 + ... + 3935846.

It is an arithmetic number, because the mean of its divisors is an integer number (12810129696).

Almost surely, 2^199823920641 is an apocalyptic number.

It is an amenable number.

199823920641 is a deficient number, since it is larger than the sum of its proper divisors (107619192063).

199823920641 is a wasteful number, since it uses less digits than its factorization.

199823920641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7820781 (or 7820778 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 54.

The spelling of 199823920641 in words is "one hundred ninety-nine billion, eight hundred twenty-three million, nine hundred twenty thousand, six hundred forty-one".