199426764205 has 8 divisors (see below), whose sum is σ = 239344254072. Its totient is φ = 159519986688.

The previous prime is 199426764167. The next prime is 199426764209. The reversal of 199426764205 is 502467624991.

It can be written as a sum of positive squares in 4 ways, for example, as 27899524 + 199398864681 = 5282^2 + 446541^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 199426764205 - 2⁷ = 199426764077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199426764209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2637072 + ... + 2711641.

It is an arithmetic number, because the mean of its divisors is an integer number (29918031759).

Almost surely, 2^199426764205 is an apocalyptic number.

It is an amenable number.

199426764205 is a deficient number, since it is larger than the sum of its proper divisors (39917489867).

199426764205 is an equidigital number, since it uses as much as digits as its factorization.

199426764205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5356175.

The product of its (nonzero) digits is 6531840, while the sum is 55.

The spelling of 199426764205 in words is "one hundred ninety-nine billion, four hundred twenty-six million, seven hundred sixty-four thousand, two hundred five".