404505339991 has 2 divisors, whose sum is σ = 404505339992. Its totient is φ = 404505339990.

The previous prime is 404505339989. The next prime is 404505340037. The reversal of 404505339991 is 199933505404.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 404505339991 - 2¹ = 404505339989 is a prime.

Together with 404505339989, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404505349991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202252669995 + 202252669996.

It is an arithmetic number, because the mean of its divisors is an integer number (202252669996).

Almost surely, 2^404505339991 is an apocalyptic number.

404505339991 is a deficient number, since it is larger than the sum of its proper divisors (1).

404505339991 is an equidigital number, since it uses as much as digits as its factorization.

404505339991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2624400, while the sum is 52.

The spelling of 404505339991 in words is "four hundred four billion, five hundred five million, three hundred thirty-nine thousand, nine hundred ninety-one".