409911781219 has 2 divisors, whose sum is σ = 409911781220. Its totient is φ = 409911781218.

The previous prime is 409911781183. The next prime is 409911781241. The reversal of 409911781219 is 912187119904.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 409911781219 - 2⁷ = 409911781091 is a prime.

It is a super-2 number, since 2×409911781219² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (409911781249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204955890609 + 204955890610.

It is an arithmetic number, because the mean of its divisors is an integer number (204955890610).

Almost surely, 2^409911781219 is an apocalyptic number.

409911781219 is a deficient number, since it is larger than the sum of its proper divisors (1).

409911781219 is an equidigital number, since it uses as much as digits as its factorization.

409911781219 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 326592, while the sum is 52.

The spelling of 409911781219 in words is "four hundred nine billion, nine hundred eleven million, seven hundred eighty-one thousand, two hundred nineteen".