199490135841 has 96 divisors (see below), whose sum is σ = 327687130368. Its totient is φ = 116237721600.

The previous prime is 199490135839. The next prime is 199490135881. The reversal of 199490135841 is 148531094991.

It is a happy number.

199490135841 is a `hidden beast` number, since 1 + 9 + 9 + 49 + 0 + 13 + 584 + 1 = 666.

199490135841 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 199490135841 - 2¹ = 199490135839 is a prime.

It is not an unprimeable number, because it can be changed into a prime (199490135821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 71219641 + ... + 71222441.

It is an arithmetic number, because the mean of its divisors is an integer number (3413407608).

Almost surely, 2^199490135841 is an apocalyptic number.

It is an amenable number.

199490135841 is a deficient number, since it is larger than the sum of its proper divisors (128196994527).

199490135841 is a wasteful number, since it uses less digits than its factorization.

199490135841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3431 (or 3428 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 54.

The spelling of 199490135841 in words is "one hundred ninety-nine billion, four hundred ninety million, one hundred thirty-five thousand, eight hundred forty-one".