199426406399 has 12 divisors (see below), whose sum is σ = 219242663640. Its totient is φ = 181264947600.

The previous prime is 199426406381. The next prime is 199426406419. The reversal of 199426406399 is 993604624991.

It is not a de Polignac number, because 199426406399 - 2⁸ = 199426406143 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199426406339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 562772 + ... + 845910.

It is an arithmetic number, because the mean of its divisors is an integer number (18270221970).

Almost surely, 2^199426406399 is an apocalyptic number.

199426406399 is a deficient number, since it is larger than the sum of its proper divisors (19816257241).

199426406399 is a wasteful number, since it uses less digits than its factorization.

199426406399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288982 (or 288971 counting only the distinct ones).

The product of its (nonzero) digits is 22674816, while the sum is 62.

The spelling of 199426406399 in words is "one hundred ninety-nine billion, four hundred twenty-six million, four hundred six thousand, three hundred ninety-nine".