199461806408 has 12 divisors (see below), whose sum is σ = 373993255545. Its totient is φ = 99730271600.

The previous prime is 199461806381. The next prime is 199461806417. The reversal of 199461806408 is 804608164991.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 190656236164 + 8805570244 = 436642^2 + 93838^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=315802.

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 2 ways as a sum of consecutive naturals, for example, 1184258 + ... + 1342158.

Almost surely, 2^199461806408 is an apocalyptic number.

It is an amenable number.

199461806408 is a deficient number, since it is larger than the sum of its proper divisors (174531449137).

199461806408 is an frugal number, since it uses more digits than its factorization.

199461806408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315808 (or 157903 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 56.

The spelling of 199461806408 in words is "one hundred ninety-nine billion, four hundred sixty-one million, eight hundred six thousand, four hundred eight".