409788949919 has 2 divisors, whose sum is σ = 409788949920. Its totient is φ = 409788949918.

The previous prime is 409788949903. The next prime is 409788949939. The reversal of 409788949919 is 919949887904.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 409788949919 - 2⁴ = 409788949903 is a prime.

It is a super-2 number, since 2×409788949919² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 409788949919.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (409788949939) 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 as a sum of consecutive naturals, namely, 204894474959 + 204894474960.

It is an arithmetic number, because the mean of its divisors is an integer number (204894474960).

Almost surely, 2^409788949919 is an apocalyptic number.

409788949919 is a deficient number, since it is larger than the sum of its proper divisors (1).

409788949919 is an equidigital number, since it uses as much as digits as its factorization.

409788949919 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 423263232, while the sum is 77.

The spelling of 409788949919 in words is "four hundred nine billion, seven hundred eighty-eight million, nine hundred forty-nine thousand, nine hundred nineteen".