199451397297 has 64 divisors (see below), whose sum is σ = 290087424000. Its totient is φ = 121490731008.

The previous prime is 199451397287. The next prime is 199451397317. The reversal of 199451397297 is 792793154991.

It is a happy number.

199451397297 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 199451397297 - 2¹⁰ = 199451396273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (199451397287) 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 63 ways as a sum of consecutive naturals, for example, 56356354 + ... + 56359892.

It is an arithmetic number, because the mean of its divisors is an integer number (4532616000).

Almost surely, 2^199451397297 is an apocalyptic number.

It is an amenable number.

199451397297 is a deficient number, since it is larger than the sum of its proper divisors (90636026703).

199451397297 is a wasteful number, since it uses less digits than its factorization.

199451397297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3910.

The product of its digits is 38578680, while the sum is 66.

The spelling of 199451397297 in words is "one hundred ninety-nine billion, four hundred fifty-one million, three hundred ninety-seven thousand, two hundred ninety-seven".