199494092221895 has 16 divisors (see below), whose sum is σ = 239599867890240. Its totient is φ = 159457328024064.

The previous prime is 199494092221859. The next prime is 199494092221901. The reversal of 199494092221895 is 598122290494991.

It is a cyclic number.

It is not a de Polignac number, because 199494092221895 - 2³⁸ = 199219214314951 is a prime.

It is a super-3 number, since 3×199494092221895³ (a number of 44 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60634319 + ... + 63839711.

It is an arithmetic number, because the mean of its divisors is an integer number (14974991743140).

Almost surely, 2^{199494092221895} is an apocalyptic number.

199494092221895 is a deficient number, since it is larger than the sum of its proper divisors (40105775668345).

199494092221895 is a wasteful number, since it uses less digits than its factorization.

199494092221895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3216154.

The product of its (nonzero) digits is 302330880, while the sum is 74.

The spelling of 199494092221895 in words is "one hundred ninety-nine trillion, four hundred ninety-four billion, ninety-two million, two hundred twenty-one thousand, eight hundred ninety-five".