199434199497 has 16 divisors (see below), whose sum is σ = 286381411008. Its totient is φ = 122722585920.

The previous prime is 199434199403. The next prime is 199434199507. The reversal of 199434199497 is 794991434991.

It is a de Polignac number, because none of the positive numbers 2^k-199434199497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (199434199697) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 733047 + ... + 967587.

It is an arithmetic number, because the mean of its divisors is an integer number (17898838188).

Almost surely, 2^199434199497 is an apocalyptic number.

It is an amenable number.

199434199497 is a deficient number, since it is larger than the sum of its proper divisors (86947211511).

199434199497 is a wasteful number, since it uses less digits than its factorization.

199434199497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256360.

The product of its digits is 79361856, while the sum is 69.

The spelling of 199434199497 in words is "one hundred ninety-nine billion, four hundred thirty-four million, one hundred ninety-nine thousand, four hundred ninety-seven".