199426604465069 has 2 divisors, whose sum is σ = 199426604465070. Its totient is φ = 199426604465068.

The previous prime is 199426604465057. The next prime is 199426604465149. The reversal of 199426604465069 is 960564406624991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 186107301673225 + 13319302791844 = 13642115^2 + 3649562^2 .

It is a cyclic number.

It is not a de Polignac number, because 199426604465069 - 2¹² = 199426604460973 is a prime.

It is a super-2 number, since 2×199426604465069² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 199426604464993 and 199426604465011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199426604461069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99713302232534 + 99713302232535.

It is an arithmetic number, because the mean of its divisors is an integer number (99713302232535).

Almost surely, 2^{199426604465069} is an apocalyptic number.

It is an amenable number.

199426604465069 is a deficient number, since it is larger than the sum of its proper divisors (1).

199426604465069 is an equidigital number, since it uses as much as digits as its factorization.

199426604465069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 604661760, while the sum is 71.

The spelling of 199426604465069 in words is "one hundred ninety-nine trillion, four hundred twenty-six billion, six hundred four million, four hundred sixty-five thousand, sixty-nine".