199426604465149 has 2 divisors, whose sum is σ = 199426604465150. Its totient is φ = 199426604465148.

The previous prime is 199426604465069. The next prime is 199426604465161. The reversal of 199426604465149 is 941564406624991.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100696348049049 + 98730256416100 = 10034757^2 + 9936310^2 .

It is a cyclic number.

It is not a de Polignac number, because 199426604465149 - 2⁴⁵ = 164242232376317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199426604765149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99713302232574 + 99713302232575.

It is an arithmetic number, because the mean of its divisors is an integer number (99713302232575).

Almost surely, 2^{199426604465149} is an apocalyptic number.

It is an amenable number.

199426604465149 is a deficient number, since it is larger than the sum of its proper divisors (1).

199426604465149 is an equidigital number, since it uses as much as digits as its factorization.

199426604465149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 403107840, while the sum is 70.

The spelling of 199426604465149 in words is "one hundred ninety-nine trillion, four hundred twenty-six billion, six hundred four million, four hundred sixty-five thousand, one hundred forty-nine".